The years are problematic, because they can mean different things to different people, they are not needed, inconsistent and redundant.
So just remove them with a scripted-diff, which can be checked via a script from the Bitcoin Core repo: ../bitcoin-core/test/lint/commit-script-check.sh HEAD~..HEAD
To give some more context:
- Anyone who wants to find the initial file creation date, or file history, can use
git logorgit blameto get more accurate results. - Some files use stale ranges (
src/mp/util.cpp), others do not, so it is unclear if ranges need to be added or updated, and when.
So just remove the years (or ranges) in this project with an easy scripted-diff.