Steps to replicate the issue (include links if applicable):
- Go to Special:UpdateProfile
- Enter 01/01 into the "Birthday" field
- Save
- Visit your profile
What happens?:
Depending on the day and month, an arbitrary year will be displayed, e.g. 100 for 01/01 and 101 for 01/02.
What should have happened instead?:
No year should be displayed.
Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):
- MediaWiki 1.43.1 (cde4276)
- SocialProfile 1.14
Other information (browser name/version, screenshots, etc.):
Example page where this occurs: https://vocaloidlyrics.miraheze.org/wiki/User:NotFish
Downstream task: https://issue-tracker.miraheze.org/T13929