I call this day "The Bulgarian International Drinking Day" and it is becoming quite popular at my university because many people seem not to like the idea of Valentine's.
We call Dec. 8th - the Students' day in BG - the same way but no one notices. It's too long to explain every time what the occasion is, so whenever we feel for drinking, we invite our friends for one of the Bulgarian International Drinking Days (every second Tuesday, as well as every Thursday, Friday and Saturday, Christmas Eve (for those who don't manage to get home), March 3rd (independence), September 18th (unification), and any other day that is announced as a drinking day).