Added Changes.md

.gitignore

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 Build
 Calendar-Simple-*.tar.gz
 Calendar-Simple/
-Changes
 META.json
 META.yml
 MYMETA.json

Changes.md

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+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [2.0.0] 2020-06-22
+
+### Changed
+
+- Code fixes
+- Refactoring to lower code complexity
+- Documentation fixes (thanks MANWAR)
+- Default week start date is now Monday
+
+## [1.23] 2018-02-22
+
+### Fixed
+
+- Packaging
+
+## [1.22] 2018-02-22
+
+### Fixed
+
+- File permissions
+- Call to `timelocal()`
+
+### Added
+
+- CI testing
+
+## [1.21] 2010-04-02
+
+### Fixed
+
+- Tests
+- Perlcritic issues
+
+## [1.20] 2008-04-19
+
+### Added
+
+- Minimum Perl version
+
+## [1.19] 2008-03-09
+
+### Added
+
+- Licence
+
+## [1.18] 2008-03-08
+
+### Fixed
+
+- "Undef" bugs
+- Packaging improvements
+
+## [1.17] 2006-10-16
+
+### Fixed
+
+- Packaging of `pcal` example
+
+## [1.16] 2006-10-15
+
+### Added
+
+- `date_span()` function
+- `pcal` example
+
+## [1.15] 2006-10-15
+
+### Fixed
+
+- More idiomatic Perl
+- Better tests
+
+## [1.14] 2006-09-10
+
+### Changed
+
+- Switch to manual version number
+
+## [1.13] 2005-05-31
+
+### Fixes
+
+- Build.PL
+
+## [1.12] 2005-03-01
+
+### Added
+
+- Pod coverage tests
+
+## [1.11] 2004-12-04
+
+### Changed
+
+- Skip DT tests if not installed
+
+## [1.10] 2004-10-30
+
+### Added
+
+- More test coverage
+- Better packaging
+
+## [1.09] 2004-10-23
+
+### Added
+
+- More test coverage
+
+## [1.08] 2003-03-14
+
+### Added
+
+- Support for DateTime (if it's installed)
+
+## [1.07] 2003-02-19
+
+### Fixed
+
+- Problems with short weeks
+- Better packaging and testing
+
+## [1.06] 2002-07-30
+
+### Fixed
+
+- Fixed the previous fix
+
+## [1.05] 2002-07-30
+
+### Fixed
+
+- "Undefined value" errors
+
+## [1.04] 2002-07-13
+
+### Changed
+
+- Documentation fixes
+
+## [1.03] 2002-07-12
+
+### Added
+
+- More documentation
+- More tests
+
+## [0.01] 2002-07-12
+
+### Added
+
+- All the things

MANIFEST

@@ -1,4 +1,4 @@
-Changes
+Changes.md
 Makefile.PL
 Build.PL
 MANIFEST