Looks like a Lithuanian war remembrance thing.
https://www.delfi.lt/news/daily/lithuania/paneveziecio-akibrokstas-pries-sausio-13-aja.d?id=73426654
Google translation of first paragraph:
"Commemorating the Day of Freedom Defenders on January 13, Lithuanians are urged to remember those who lost their lives in the fight for freedom by wearing a single badge - the forget-me-not ring. For the third time, the historic memory campaign is gaining in popularity every year."