Add template variable for copyright year (#1101)

Author: jasonwashburn

cookiecutter.json

@@ -6,6 +6,7 @@
   "email": "mail@claudiojolowicz.com",
   "github_user": "cjolowicz",
   "version": "0.0.0",
+  "copyright_year": "{% now 'utc', '%Y' %}",
   "license": ["MIT", "Apache-2.0", "GPL-3.0"],
   "development_status": [
     "Development Status :: 1 - Planning",

docs/guide.rst

@@ -263,6 +263,7 @@ Here is a complete list of the project variables defined by this template:
    ``email``              E-mail address of the author      katherine@example.com
    ``github_user``        GitHub username of the author     ``katherine``
    ``version``            Initial project version           ``0.0.0``
+   ``copyright_year``     The project copyright year        ``2022``
    ``license``            The project license               ``MIT``
    ``development_status`` Development status of the project ``Development Status :: 3 - Alpha``
    ====================== ================================= ===================================

{{cookiecutter.project_name}}/docs/conf.py

@@ -1,10 +1,7 @@
 """Sphinx configuration."""
-from datetime import datetime
-
-
 project = "{{cookiecutter.friendly_name}}"
 author = "{{cookiecutter.author}}"
-copyright = f"{datetime.now().year}, {author}"
+copyright = "{{cookiecutter.copyright_year}}, {author}"
 extensions = [
     "sphinx.ext.autodoc",
     "sphinx.ext.napoleon",

{{cookiecutter.project_name}}/{% if cookiecutter.license == 'Apache-2.0' -%} LICENSE.rst {%- endif %}

@@ -1,4 +1,4 @@
-Copyright {% now 'utc', '%Y' %} {{ cookiecutter.author }}
+Copyright {{ cookiecutter.copyright_year }} {{ cookiecutter.author }}
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.

{{cookiecutter.project_name}}/{% if cookiecutter.license == 'GPL-3.0' -%} LICENSE.rst {%- endif %}

@@ -1,5 +1,5 @@
 {{ cookiecutter.friendly_name }}
-Copyright (C) {% now 'utc', '%Y' %}  {{ cookiecutter.author }}
+Copyright (C) {{ cookiecutter.copyright_year }}  {{ cookiecutter.author }}
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by

{{cookiecutter.project_name}}/{% if cookiecutter.license == 'MIT' -%} LICENSE.rst {%- endif %}

@@ -1,7 +1,7 @@
 MIT License
 ===========
 
-Copyright © {% now 'utc', '%Y' %} {{ cookiecutter.author }}
+Copyright © {{ cookiecutter.copyright_year }} {{ cookiecutter.author }}
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal