diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index 898d8f5..6ad8ee4 100644
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -4,7 +4,7 @@
 | New feature?   | yes/no
 | Related issues | Fix #... <!-- prefix each issue number with "Fix #", if any -->
 | Has BC-break   | yes/no
-| License        | CeCILL v2.1
+| License        | GNU AGPL-v3
 
 **Checklist:**
 <!--
diff --git a/LICENSE.md b/LICENSE.md
new file mode 100644
index 0000000..c7f159a
--- /dev/null
+++ b/LICENSE.md
@@ -0,0 +1,614 @@
+### GNU AFFERO GENERAL PUBLIC LICENSE
+
+Version 3, 19 November 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc.
+<https://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+### Preamble
+
+The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works. By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains
+free software for all its users.
+
+When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+Developers that use our General Public Licenses protect your rights
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+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
+
+A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
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+incorporate. Many developers of free software are heartened and
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+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
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+
+An older license, called the Affero General Public License and
+published by Affero, was designed to accomplish similar goals. This is
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+released a new version of the Affero GPL which permits relicensing
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+
+The precise terms and conditions for copying, distribution and
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+
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+
+A patent license is "discriminatory" if it does not include within the
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+license was granted, prior to 28 March 2007.
+
+Nothing in this License shall be construed as excluding or limiting
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+
+#### 12. No Surrender of Others' Freedom.
+
+If conditions are imposed on you (whether by court order, agreement or
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+excuse you from the conditions of this License. If you cannot convey a
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+consequence you may not convey it at all. For example, if you agree to
+terms that obligate you to collect a royalty for further conveying
+from those to whom you convey the Program, the only way you could
+satisfy both those terms and this License would be to refrain entirely
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+
+#### 13. Remote Network Interaction; Use with the GNU General Public License.
+
+Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
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+Notwithstanding any other provision of this License, you have
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+3 of the GNU General Public License.
+
+#### 14. Revised Versions of this License.
+
+The Free Software Foundation may publish revised and/or new versions
+of the GNU Affero General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program
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+
+If the Program specifies that a proxy can decide which future versions
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+
+Later license versions may give you additional or different
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+later version.
+
+#### 15. Disclaimer of Warranty.
+
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
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+
+#### 16. Limitation of Liability.
+
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
+CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
+ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
+NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
+LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
+TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
+PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+#### 17. Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
diff --git a/LICENSE.txt b/LICENSE.txt
deleted file mode 100644
index e7c9f89..0000000
--- a/LICENSE.txt
+++ /dev/null
@@ -1,519 +0,0 @@
-
-  CeCILL FREE SOFTWARE LICENSE AGREEMENT
-
-Version 2.1 dated 2013-06-21
-
-
-    Notice
-
-This Agreement is a Free Software license agreement that is the result
-of discussions between its authors in order to ensure compliance with
-the two main principles guiding its drafting:
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-  * firstly, compliance with the principles governing the distribution
-    of Free Software: access to source code, broad rights granted to users,
-  * secondly, the election of a governing law, French law, with which it
-    is conformant, both as regards the law of torts and intellectual
-    property law, and the protection that it offers to both authors and
-    holders of the economic rights over software.
-
-The authors of the CeCILL (for Ce[a] C[nrs] I[nria] L[ogiciel] L[ibre]) 
-license are: 
-
-Commissariat à l'énergie atomique et aux énergies alternatives - CEA, a
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-Institut National de Recherche en Informatique et en Automatique -
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-necessary clarification.
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-    Article 1 - DEFINITIONS
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- 3. entitlement to observe, study or test its operation so as to
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-      5.2 ENTITLEMENT TO MAKE CONTRIBUTIONS
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-The right to make Contributions includes the right to translate, adapt,
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-The Licensee is authorized to make any or all Contributions to the
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-      5.3 RIGHT OF DISTRIBUTION
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-Software by any means.
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-The Licensee is further authorized to distribute copies of the modified
-or unmodified Software to third parties according to the terms and
-conditions set forth hereinafter.
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-        5.3.1 DISTRIBUTION OF SOFTWARE WITHOUT MODIFICATION
-
-The Licensee is authorized to distribute true copies of the Software in
-Source Code or Object Code form, provided that said distribution
-complies with all the provisions of the Agreement and is accompanied by:
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- 2. a notice relating to the limitation of both the Licensor's warranty
-    and liability as set forth in Articles 8 and 9,
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-and that, in the event that only the Object Code of the Software is
-redistributed, the Licensee allows effective access to the full Source
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-data transfer.
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-
-        5.3.2 DISTRIBUTION OF MODIFIED SOFTWARE
-
-When the Licensee makes a Contribution to the Software, the terms and
-conditions for the distribution of the resulting Modified Software
-become subject to all the provisions of this Agreement.
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-The Licensee is authorized to distribute the Modified Software, in
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- 1. a copy of the Agreement,
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- 2. a notice relating to the limitation of both the Licensor's warranty
-    and liability as set forth in Articles 8 and 9,
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-and, in the event that only the object code of the Modified Software is
-redistributed,
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- 3. a note stating the conditions of effective access to the full source
-    code of the Modified Software for a period of at least three years
-    from the distribution of the Modified Software, it being understood
-    that the additional acquisition cost of the source code shall not
-    exceed the cost of the data transfer.
-
-
-        5.3.3 DISTRIBUTION OF EXTERNAL MODULES
-
-When the Licensee has developed an External Module, the terms and
-conditions of this Agreement do not apply to said External Module, that
-may be distributed under a separate license agreement.
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-        5.3.4 COMPATIBILITY WITH OTHER LICENSES
-
-The Licensee can include a code that is subject to the provisions of one
-of the versions of the GNU GPL, GNU Affero GPL and/or EUPL in the
-Modified or unmodified Software, and distribute that entire code under
-the terms of the same version of the GNU GPL, GNU Affero GPL and/or EUPL.
-
-The Licensee can include the Modified or unmodified Software in a code
-that is subject to the provisions of one of the versions of the GNU GPL,
-GNU Affero GPL and/or EUPL and distribute that entire code under the
-terms of the same version of the GNU GPL, GNU Affero GPL and/or EUPL.
-
-
-    Article 6 - INTELLECTUAL PROPERTY
-
-
-      6.1 OVER THE INITIAL SOFTWARE
-
-The Holder owns the economic rights over the Initial Software. Any or
-all use of the Initial Software is subject to compliance with the terms
-and conditions under which the Holder has elected to distribute its work
-and no one shall be entitled to modify the terms and conditions for the
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-The Holder undertakes that the Initial Software will remain ruled at
-least by this Agreement, for the duration set forth in Article 4.2 <#term>.
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-
-      6.2 OVER THE CONTRIBUTIONS
-
-The Licensee who develops a Contribution is the owner of the
-intellectual property rights over this Contribution as defined by
-applicable law.
-
-
-      6.3 OVER THE EXTERNAL MODULES
-
-The Licensee who develops an External Module is the owner of the
-intellectual property rights over this External Module as defined by
-applicable law and is free to choose the type of agreement that shall
-govern its distribution.
-
-
-      6.4 JOINT PROVISIONS
-
-The Licensee expressly undertakes:
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- 1. not to remove, or modify, in any manner, the intellectual property
-    notices attached to the Software;
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- 2. to reproduce said notices, in an identical manner, in the copies of
-    the Software modified or not.
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-The Licensee undertakes not to directly or indirectly infringe the
-intellectual property rights on the Software of the Holder and/or
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-and all measures required to ensure respect of said intellectual
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-
-
-    Article 7 - RELATED SERVICES
-
-7.1 Under no circumstances shall the Agreement oblige the Licensor to
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-However, the Licensor is entitled to offer this type of services. The
-terms and conditions of such technical assistance, and/or such
-maintenance, shall be set forth in a separate instrument. Only the
-Licensor offering said maintenance and/or technical assistance services
-shall incur liability therefor.
-
-7.2 Similarly, any Licensor is entitled to offer to its licensees, under
-its sole responsibility, a warranty, that shall only be binding upon
-itself, for the redistribution of the Software and/or the Modified
-Software, under terms and conditions that it is free to decide. Said
-warranty, and the financial terms and conditions of its application,
-shall be subject of a separate instrument executed between the Licensor
-and the Licensee.
-
-
-    Article 8 - LIABILITY
-
-8.1 Subject to the provisions of Article 8.2, the Licensee shall be
-entitled to claim compensation for any direct loss it may have suffered
-from the Software as a result of a fault on the part of the relevant
-Licensor, subject to providing evidence thereof.
-
-8.2 The Licensor's liability is limited to the commitments made under
-this Agreement and shall not be incurred as a result of in particular:
-(i) loss due the Licensee's total or partial failure to fulfill its
-obligations, (ii) direct or consequential loss that is suffered by the
-Licensee due to the use or performance of the Software, and (iii) more
-generally, any consequential loss. In particular the Parties expressly
-agree that any or all pecuniary or business loss (i.e. loss of data,
-loss of profits, operating loss, loss of customers or orders,
-opportunity cost, any disturbance to business activities) or any or all
-legal proceedings instituted against the Licensee by a third party,
-shall constitute consequential loss and shall not provide entitlement to
-any or all compensation from the Licensor.
-
-
-    Article 9 - WARRANTY
-
-9.1 The Licensee acknowledges that the scientific and technical
-state-of-the-art when the Software was distributed did not enable all
-possible uses to be tested and verified, nor for the presence of
-possible defects to be detected. In this respect, the Licensee's
-attention has been drawn to the risks associated with loading, using,
-modifying and/or developing and reproducing the Software which are
-reserved for experienced users.
-
-The Licensee shall be responsible for verifying, by any or all means,
-the suitability of the product for its requirements, its good working
-order, and for ensuring that it shall not cause damage to either persons
-or properties.
-
-9.2 The Licensor hereby represents, in good faith, that it is entitled
-to grant all the rights over the Software (including in particular the
-rights set forth in Article 5 <#scope>).
-
-9.3 The Licensee acknowledges that the Software is supplied "as is" by
-the Licensor without any other express or tacit warranty, other than
-that provided for in Article 9.2 <#good-faith> and, in particular,
-without any warranty as to its commercial value, its secured, safe,
-innovative or relevant nature.
-
-Specifically, the Licensor does not warrant that the Software is free
-from any error, that it will operate without interruption, that it will
-be compatible with the Licensee's own equipment and software
-configuration, nor that it will meet the Licensee's requirements.
-
-9.4 The Licensor does not either expressly or tacitly warrant that the
-Software does not infringe any third party intellectual property right
-relating to a patent, software or any other property right. Therefore,
-the Licensor disclaims any and all liability towards the Licensee
-arising out of any or all proceedings for infringement that may be
-instituted in respect of the use, modification and redistribution of the
-Software. Nevertheless, should such proceedings be instituted against
-the Licensee, the Licensor shall provide it with technical and legal
-expertise for its defense. Such technical and legal expertise shall be
-decided on a case-by-case basis between the relevant Licensor and the
-Licensee pursuant to a memorandum of understanding. The Licensor
-disclaims any and all liability as regards the Licensee's use of the
-name of the Software. No warranty is given as regards the existence of
-prior rights over the name of the Software or as regards the existence
-of a trademark.
-
-
-    Article 10 - TERMINATION
-
-10.1 In the event of a breach by the Licensee of its obligations
-hereunder, the Licensor may automatically terminate this Agreement
-thirty (30) days after notice has been sent to the Licensee and has
-remained ineffective.
-
-10.2 A Licensee whose Agreement is terminated shall no longer be
-authorized to use, modify or distribute the Software. However, any
-licenses that it may have granted prior to termination of the Agreement
-shall remain valid subject to their having been granted in compliance
-with the terms and conditions hereof.
-
-
-    Article 11 - MISCELLANEOUS
-
-
-      11.1 EXCUSABLE EVENTS
-
-Neither Party shall be liable for any or all delay, or failure to
-perform the Agreement, that may be attributable to an event of force
-majeure, an act of God or an outside cause, such as defective
-functioning or interruptions of the electricity or telecommunications
-networks, network paralysis following a virus attack, intervention by
-government authorities, natural disasters, water damage, earthquakes,
-fire, explosions, strikes and labor unrest, war, etc.
-
-11.2 Any failure by either Party, on one or more occasions, to invoke
-one or more of the provisions hereof, shall under no circumstances be
-interpreted as being a waiver by the interested Party of its right to
-invoke said provision(s) subsequently.
-
-11.3 The Agreement cancels and replaces any or all previous agreements,
-whether written or oral, between the Parties and having the same
-purpose, and constitutes the entirety of the agreement between said
-Parties concerning said purpose. No supplement or modification to the
-terms and conditions hereof shall be effective as between the Parties
-unless it is made in writing and signed by their duly authorized
-representatives.
-
-11.4 In the event that one or more of the provisions hereof were to
-conflict with a current or future applicable act or legislative text,
-said act or legislative text shall prevail, and the Parties shall make
-the necessary amendments so as to comply with said act or legislative
-text. All other provisions shall remain effective. Similarly, invalidity
-of a provision of the Agreement, for any reason whatsoever, shall not
-cause the Agreement as a whole to be invalid.
-
-
-      11.5 LANGUAGE
-
-The Agreement is drafted in both French and English and both versions
-are deemed authentic.
-
-
-    Article 12 - NEW VERSIONS OF THE AGREEMENT
-
-12.1 Any person is authorized to duplicate and distribute copies of this
-Agreement.
-
-12.2 So as to ensure coherence, the wording of this Agreement is
-protected and may only be modified by the authors of the License, who
-reserve the right to periodically publish updates or new versions of the
-Agreement, each with a separate number. These subsequent versions may
-address new issues encountered by Free Software.
-
-12.3 Any Software distributed under a given version of the Agreement may
-only be subsequently distributed under the same version of the Agreement
-or a subsequent version, subject to the provisions of Article 5.3.4
-<#compatibility>.
-
-
-    Article 13 - GOVERNING LAW AND JURISDICTION
-
-13.1 The Agreement is governed by French law. The Parties agree to
-endeavor to seek an amicable solution to any disagreements or disputes
-that may arise during the performance of the Agreement.
-
-13.2 Failing an amicable solution within two (2) months as from their
-occurrence, and unless emergency proceedings are necessary, the
-disagreements or disputes shall be referred to the Paris Courts having
-jurisdiction, by the more diligent Party.
-
diff --git a/_kosmorro/__init__.py b/_kosmorro/__init__.py
index e5a0d9b..239afac 100644
--- a/_kosmorro/__init__.py
+++ b/_kosmorro/__init__.py
@@ -1 +1,17 @@
 #!/usr/bin/env python3
+
+#    Kosmorro - Compute The Next Ephemerides
+#    Copyright (C) 2019  Jérôme Deuchnord <jerome@deuchnord.fr>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.
diff --git a/_kosmorro/__version__.py b/_kosmorro/__version__.py
index 10be16d..e63786f 100644
--- a/_kosmorro/__version__.py
+++ b/_kosmorro/__version__.py
@@ -1,5 +1,21 @@
 #!/usr/bin/env python3
 
+#    Kosmorro - Compute The Next Ephemerides
+#    Copyright (C) 2019  Jérôme Deuchnord <jerome@deuchnord.fr>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 __title__ = "kosmorro"
 __description__ = "A program that computes your ephemerides"
 __url__ = "https://kosmorro.space"
diff --git a/_kosmorro/dumper.py b/_kosmorro/dumper.py
index eb77f19..3cec6e7 100644
--- a/_kosmorro/dumper.py
+++ b/_kosmorro/dumper.py
@@ -1,5 +1,21 @@
 #!/usr/bin/env python3
 
+#    Kosmorro - Compute The Next Ephemerides
+#    Copyright (C) 2019  Jérôme Deuchnord <jerome@deuchnord.fr>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 from abc import ABC, abstractmethod
 import datetime
 import json
diff --git a/_kosmorro/environment.py b/_kosmorro/environment.py
index c199bad..18542c3 100644
--- a/_kosmorro/environment.py
+++ b/_kosmorro/environment.py
@@ -1,5 +1,21 @@
 #!/usr/bin/env python3
 
+#    Kosmorro - Compute The Next Ephemerides
+#    Copyright (C) 2019  Jérôme Deuchnord <jerome@deuchnord.fr>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 import os
 import re
 from pathlib import Path
diff --git a/_kosmorro/exceptions.py b/_kosmorro/exceptions.py
index 4ad9711..88ae9b8 100644
--- a/_kosmorro/exceptions.py
+++ b/_kosmorro/exceptions.py
@@ -1,5 +1,21 @@
 #!/usr/bin/env python3
 
+#    Kosmorro - Compute The Next Ephemerides
+#    Copyright (C) 2019  Jérôme Deuchnord <jerome@deuchnord.fr>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 from datetime import date
 from _kosmorro.i18n.utils import _, SHORT_DATE_FORMAT
 
diff --git a/_kosmorro/i18n/utils.py b/_kosmorro/i18n/utils.py
index 18fb36a..b65d525 100644
--- a/_kosmorro/i18n/utils.py
+++ b/_kosmorro/i18n/utils.py
@@ -1,5 +1,21 @@
 #!/usr/bin/env python3
 
+#    Kosmorro - Compute The Next Ephemerides
+#    Copyright (C) 2019  Jérôme Deuchnord <jerome@deuchnord.fr>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 import gettext
 import os
 
diff --git a/_kosmorro/locales/messages.pot b/_kosmorro/locales/messages.pot
index b8656b7..51395ea 100644
--- a/_kosmorro/locales/messages.pot
+++ b/_kosmorro/locales/messages.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: kosmorro 0.10.1\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2021-07-18 17:45+0200\n"
+"POT-Creation-Date: 2021-08-10 20:23+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -27,76 +27,76 @@ msgid ""
 "offset format."
 msgstr ""
 
-#: _kosmorro/dumper.py:95
+#: _kosmorro/dumper.py:111
 msgid "Expected events:"
 msgstr ""
 
-#: _kosmorro/dumper.py:102
+#: _kosmorro/dumper.py:118
 msgid "Note: All the hours are given in UTC."
 msgstr ""
 
-#: _kosmorro/dumper.py:109
+#: _kosmorro/dumper.py:125
 msgid "Note: All the hours are given in the UTC{offset} timezone."
 msgstr ""
 
-#: _kosmorro/dumper.py:177 _kosmorro/dumper.py:307
+#: _kosmorro/dumper.py:193 _kosmorro/dumper.py:323
 msgid "Object"
 msgstr ""
 
-#: _kosmorro/dumper.py:178 _kosmorro/dumper.py:308
+#: _kosmorro/dumper.py:194 _kosmorro/dumper.py:324
 msgid "Rise time"
 msgstr ""
 
-#: _kosmorro/dumper.py:179 _kosmorro/dumper.py:310
+#: _kosmorro/dumper.py:195 _kosmorro/dumper.py:326
 msgid "Culmination time"
 msgstr ""
 
-#: _kosmorro/dumper.py:180 _kosmorro/dumper.py:312
+#: _kosmorro/dumper.py:196 _kosmorro/dumper.py:328
 msgid "Set time"
 msgstr ""
 
-#: _kosmorro/dumper.py:208
+#: _kosmorro/dumper.py:224
 msgid "Moon phase is unavailable for this date."
 msgstr ""
 
-#: _kosmorro/dumper.py:212 _kosmorro/dumper.py:316
+#: _kosmorro/dumper.py:228 _kosmorro/dumper.py:332
 msgid "Moon phase:"
 msgstr ""
 
-#: _kosmorro/dumper.py:216
+#: _kosmorro/dumper.py:232
 msgid "{next_moon_phase} on {next_moon_phase_date} at {next_moon_phase_time}"
 msgstr ""
 
-#: _kosmorro/dumper.py:280
+#: _kosmorro/dumper.py:296
 msgid "Overview of your sky"
 msgstr ""
 
-#: _kosmorro/dumper.py:288
+#: _kosmorro/dumper.py:304
 msgid ""
 "This document summarizes the ephemerides and the events of {date}. It "
 "aims to help you to prepare your observation session. All the hours are "
 "given in {timezone}."
 msgstr ""
 
-#: _kosmorro/dumper.py:298
+#: _kosmorro/dumper.py:314
 msgid ""
 "Don't forget to check the weather forecast before you go out with your "
 "equipment."
 msgstr ""
 
-#: _kosmorro/dumper.py:305
+#: _kosmorro/dumper.py:321
 msgid "Ephemerides of the day"
 msgstr ""
 
-#: _kosmorro/dumper.py:314
+#: _kosmorro/dumper.py:330
 msgid "hours"
 msgstr ""
 
-#: _kosmorro/dumper.py:321
+#: _kosmorro/dumper.py:337
 msgid "Expected events"
 msgstr ""
 
-#: _kosmorro/dumper.py:475
+#: _kosmorro/dumper.py:491
 msgid ""
 "Building PDF was not possible, because some dependencies are not "
 "installed.\n"
@@ -104,7 +104,7 @@ msgid ""
 "pdf/ for more information."
 msgstr ""
 
-#: _kosmorro/dumper.py:528
+#: _kosmorro/dumper.py:544
 #, python-format
 msgid ""
 "An error occurred during the compilation of the PDF.\n"
@@ -112,7 +112,7 @@ msgid ""
 "share the content of the log file at /tmp/kosmorro-%s.log"
 msgstr ""
 
-#: _kosmorro/exceptions.py:18
+#: _kosmorro/exceptions.py:34
 msgid "The date must be between {minimum_date} and {maximum_date}"
 msgstr ""
 
@@ -125,104 +125,104 @@ msgstr ""
 msgid "The given Plus Code seems to be a short code, please provide a full code."
 msgstr ""
 
-#: _kosmorro/main.py:42
+#: _kosmorro/main.py:58
 msgid ""
 "Save the planet and paper!\n"
 "Consider printing your PDF document only if really necessary, and use the"
 " other side of the sheet."
 msgstr ""
 
-#: _kosmorro/main.py:51
+#: _kosmorro/main.py:67
 msgid ""
 "PDF output will not contain the ephemerides, because you didn't provide "
 "the observation coordinates."
 msgstr ""
 
-#: _kosmorro/main.py:96
+#: _kosmorro/main.py:112
 msgid "The file could not be saved in \"{path}\": {error}"
 msgstr ""
 
-#: _kosmorro/main.py:110
+#: _kosmorro/main.py:126
 msgid "Please provide a file path to export in this format (--output)."
 msgstr ""
 
-#: _kosmorro/main.py:143
+#: _kosmorro/main.py:159
 msgid "Moon phase can only be displayed between {min_date} and {max_date}"
 msgstr ""
 
-#: _kosmorro/main.py:182
+#: _kosmorro/main.py:198
 msgid "Running on Python {python_version} with Kosmorrolib v{kosmorrolib_version}"
 msgstr ""
 
-#: _kosmorro/main.py:192
+#: _kosmorro/main.py:208
 msgid "Do you really want to clear Kosmorro's cache? [yN] "
 msgstr ""
 
-#: _kosmorro/main.py:200
+#: _kosmorro/main.py:216
 msgid "Incorrect answer, cache not cleared."
 msgstr ""
 
-#: _kosmorro/main.py:210
+#: _kosmorro/main.py:226
 msgid ""
 "Compute the ephemerides and the events for a given date and a given "
 "position on Earth."
 msgstr ""
 
-#: _kosmorro/main.py:213
+#: _kosmorro/main.py:229
 msgid ""
 "By default, only the events will be computed for today ({date}).\n"
 "To compute also the ephemerides, latitude and longitude arguments are "
 "needed."
 msgstr ""
 
-#: _kosmorro/main.py:227
+#: _kosmorro/main.py:243
 msgid "Show the program version"
 msgstr ""
 
-#: _kosmorro/main.py:235
+#: _kosmorro/main.py:251
 msgid "Delete all the files from Kosmorro's cache."
 msgstr ""
 
-#: _kosmorro/main.py:243
+#: _kosmorro/main.py:259
 msgid "The format to output the information to"
 msgstr ""
 
-#: _kosmorro/main.py:250
+#: _kosmorro/main.py:266
 msgid ""
 "The observer's position on Earth, in the \"{latitude},{longitude}\" "
 "format.Can also be set in the KOSMORRO_POSITION environment variable."
 msgstr ""
 
-#: _kosmorro/main.py:260
+#: _kosmorro/main.py:276
 msgid ""
 "The date for which the ephemerides must be calculated. Can be in the "
 "YYYY-MM-DD format or an interval in the \"[+-]YyMmDd\" format (with Y, M,"
 " and D numbers). Defaults to today ({default_date})."
 msgstr ""
 
-#: _kosmorro/main.py:271
+#: _kosmorro/main.py:287
 msgid ""
 "The timezone to display the hours in (e.g. 2 for UTC+2 or -3 for UTC-3). "
 "Can also be set in the KOSMORRO_TIMEZONE environment variable."
 msgstr ""
 
-#: _kosmorro/main.py:280
+#: _kosmorro/main.py:296
 msgid "Disable the colors in the console."
 msgstr ""
 
-#: _kosmorro/main.py:287
+#: _kosmorro/main.py:303
 msgid ""
 "A file to export the output to. If not given, the standard output is "
 "used. This argument is needed for PDF format."
 msgstr ""
 
-#: _kosmorro/main.py:296
+#: _kosmorro/main.py:312
 msgid ""
 "Do not generate a graph to represent the rise and set times in the PDF "
 "format."
 msgstr ""
 
-#: _kosmorro/main.py:304
+#: _kosmorro/main.py:320
 msgid "Show debugging messages"
 msgstr ""
 
@@ -328,19 +328,19 @@ msgstr ""
 msgid "Pluto"
 msgstr ""
 
-#: _kosmorro/i18n/utils.py:11
+#: _kosmorro/i18n/utils.py:27
 msgid "{day_of_week} {month} {day_number}, {year}"
 msgstr ""
 
-#: _kosmorro/i18n/utils.py:14
+#: _kosmorro/i18n/utils.py:30
 msgid "{month} {day_number}, {hours}:{minutes}"
 msgstr ""
 
-#: _kosmorro/i18n/utils.py:17
+#: _kosmorro/i18n/utils.py:33
 msgid "{month} {day_number}, {year}"
 msgstr ""
 
-#: _kosmorro/i18n/utils.py:20
+#: _kosmorro/i18n/utils.py:36
 msgid "{hours}:{minutes}"
 msgstr ""
 
diff --git a/_kosmorro/main.py b/_kosmorro/main.py
index 4c28146..56c5c52 100644
--- a/_kosmorro/main.py
+++ b/_kosmorro/main.py
@@ -1,5 +1,21 @@
 #!/usr/bin/env python3
 
+#    Kosmorro - Compute The Next Ephemerides
+#    Copyright (C) 2019  Jérôme Deuchnord <jerome@deuchnord.fr>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 import argparse
 import locale
 import re
diff --git a/kosmorro b/kosmorro
index 1d8936a..7b10fe5 100755
--- a/kosmorro
+++ b/kosmorro
@@ -1,5 +1,21 @@
 #!/usr/bin/env python3
 
+#    Kosmorro - Compute The Next Ephemerides
+#    Copyright (C) 2019  Jérôme Deuchnord <jerome@deuchnord.fr>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 import sys
 import locale
 from _kosmorro.main import main
diff --git a/setup.py b/setup.py
index 522247e..8cc8d8b 100644
--- a/setup.py
+++ b/setup.py
@@ -1,5 +1,21 @@
 #!/usr/bin/env python3
 
+#    Kosmorro - Compute The Next Ephemerides
+#    Copyright (C) 2019  Jérôme Deuchnord <jerome@deuchnord.fr>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 import pathlib
 from setuptools import setup, find_packages
 
@@ -14,8 +30,8 @@ setup(
     author="Jérôme Deuchnord",
     author_email="jerome@deuchnord.fr",
     url="http://kosmorro.space",
-    license="CeCILL-v2.1",
-    description="A program to compute the ephemerides.",
+    license="AGPL-3.0",
+    description="A program that computes the ephemerides.",
     long_description=README,
     long_description_content_type="text/markdown",
     keywords="kosmorro astronomy ephemerides ephemeris",