Animemes

https://en.wikipedia.org/wiki/Christmas_cake#Japanese_metaphor

In Japan, women had traditionally been expected to marry at a young age, and those who were unmarried after the age of 25 were metaphorically referred to as (unsold) Christmas cakes (クリスマスケーキ) in reference to items which are still unsold after the 25th. The term first became popular during the 1980s but has since become less common because Japanese women today can remain unmarried with somewhat less stigmatization. An equivalent term does, however, still exist that hearkens to the "unsold" nature of unmarried women, urenokori (売れ残り, "unsold goods").

Christmas in Japan is pretty much another holiday where if you're single you don't have anything to do. But unfortunately for OP, if you already don't have anyone trying to score you as a last minute date for Valentine's then probably nothing will change

All the maids are lined up and waiting for you on the sidewalks of Akihabara.