Credits for the Logos of the Linux Calendars

  The Debian Open Use Logo(s) are
  Copyright (c) 1999 Software in the Public Interest, Inc.,
      https://www.spi-inc.org/
  and are released under the terms of the
  GNU Lesser General Public License, version 3 or any later version,
      https://www.gnu.org/copyleft/lgpl.html
  or, at your option, of the
  Creative Commons Attribution-ShareAlike 3.0 Unported License.
     https://creativecommons.org/licenses/by-sa/3.0/

  Ubuntu Logo:
  https://fr.m.wikipedia.org/wiki/Fichier:Ubuntu-Logo_ohne_Schriftzug.svg
  Ubuntu is a registered trademark of Canonical Ltd.

  Copyright 2017 Canonical Ltd.

  This work is licensed under the
    Creative Commons Attribution-Share Alike 3.0 Unported License.
  To view a copy of this license, visit
    http://creativecommons.org/licenses/by-sa/3.0/
  or send a letter to
    Creative Commons,
    171 Second Street, Suite 300,
    San Francisco, California, 94105, USA.

  Use of Canonical Trade Marks is subject to Canonical's IP Rights Policy.
  Canonical's IP Right Policy can be found at
  https://www.ubuntu.com/legal/terms-and-policies/intellectual-property-policy

  Fedora Logo:
  https://fr.wikipedia.org/wiki/Fichier:Fedora_logo.svg

  All Mageia artwork is distributed under a Creative Commons Attribution-Share Alike license.
  For more information see the license deed at:
    http://creativecommons.org/licenses/by-sa/3.0

  The Mageia logo, in particular, is a trademark of Mageia.org,
  and as such it is also governed by Mageia's Trademark Policy:
    https://wiki.mageia.org/en/Logo_and_trademark_policy

  Linux Mint Logo
  Author: Clement Lefebvre

  Origin:
    https://fr.wikipedia.org/wiki/Fichier:Linux_Mint_Official_Logo.svg
    https://upload.wikimedia.org/wikipedia/commons/5/5c/Linux_Mint_Official_Logo.svg

  Distributed under the Creative Commons Attribution 3.0 License:
    https://creativecommons.org/licenses/by/3.0/deed.en
    https://creativecommons.org/licenses/by/3.0/deed.fr