A current copyright year suggests that a project is being actively developed. When the copyright notice is updated, make sure to update the following files:
- devel/sage-main/doc/common/conf.py
- data/extcode/sage/ext/mac-app/Sage.app/Contents/Info.plist
- data/extcode/sage/ext/mac-app/Sage.app/Contents/Resources/English.lproj/InfoPlist.strings
- README.txt