Frank, I've read this on the net:

"Valentine's Day (or Saint Valentine's Day) is observed on February 14 each year. Today Valentine's Day is celebrated in many countries around the world, mostly in the West, although it remains a working day in all of them. The original "St. Valentine" was just a liturgical celebration of one or more early Christian saint named Valentinus. All the modern romantic connotations were added several centuries later by poets.

The day first became associated with romantic love in the circle of Geoffrey Chaucer in the High Middle Ages, when the tradition of courtly love flourished. By the 15th century, it had evolved into an occasion in which lovers expressed their love for each other by presenting flowers, offering confectionery, and sending greeting cards (known as "valentines").

Modern Valentine's Day symbols include the heart-shaped outline, doves, and the figure of the winged Cupid. Since the 19th century, handwritten valentines have given way to mass-produced greeting cards."

Wish you in general and yours in particular a great Valentines day, my friend!