No idea really, i am not a romantic person, my wife children and grand children is my life and every day is mothersday and every day is family day. Never been bothered with these other dsys.
Taken from Wikipedia.
A popular account of Saint Valentine of Rome states that he was imprisoned for performing weddings for soldiers who were forbidden to marry and for ministering to Christians, who were persecuted under the Roman Empire. According to legend, during his imprisonment, he healed the daughter of his jailer, Asterius. An embellishment to this story states that before his execution he wrote her a letter signed "Your Valentine" as a farewell.
The day was first associated with romantic love, and it evolved into an occasion in which lovers expressed their love for each other by presenting flowers, offering confectionery, and sending greeting cards.
Valentine's Day symbols that are used today include the heart-shaped outline, doves, and the figure of the winged Cupid.