This is that the bulgarian celebrate on the 14.2. not the day of international flower shops.
Trifon Zarezan is the day of the wine growers and in the most cellars and villages it is celebrated in some more in a touristic in some more a tradtional way.
So may be thing about to go anythere special interessting for Pamporovo visiters because the tracian valley region near Plovdiv have a lot winerys most of them with degustation cellar and special partys on this day.