Runs done on the same date one year ago (e.g. 02/02/2019 at the time of posting this) are displayed as being done "1 years ago".

Example from The Witness leaderboard: Run link: https://www.speedrun.com/thewitness/run/yjk9e6gm

What exactly are you saying is the issue? That is says “years” instead of “year”? If so, yeah, that’s long been known about but it’s probably near the bottom of the list of things to fix on the site.