St Valentine Day...taken from Wikipedia

This article is about the liturgical celebration and romantic holiday. For Brazil's Dia de São Valentim, see Dia dos Namorados. For uses of Valentine, see Valentine. For other uses, see Valentine's Day (disambiguation).

Saint Valentine's Day
Antique Valentine's card
Also called	Valentine's Day Feast of Saint Valentine
Observed by	People in many countries; Anglican Communion (see calendar), Eastern Orthodox Church (see calendar), Lutheran Church (see calendar)
Type	Cultural, Christian, commercial
Significance	Feast day of Saint Valentine; the celebration of Love and affection
Observances	Sending greeting cards and gifts, dating, church services
Date	February 14 (fixed by the Catholic Church); July 7 (fixed by the Orthodox Church)
Frequency	annual

Shrine of St. Valentine in Whitefriar Street Carmelite Church in Dublin, Ireland

Saint Valentine of Terni and his disciples

Saint Valentine's Day, also known as Valentine's Day or the Feast of Saint Valentine,^[1] is observed on February 14 each year. It is celebrated in many countries around the world, although it remains a working day in most of them.
St. Valentine's Day began as a liturgical celebration of one or more early Christian saints named Valentinus. Several martyrdom stories were invented for the various Valentines that belonged to February 14, and added to later martyrologies.^[2] A popular hagiographical 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.^[3] Today, Saint Valentine's Day is an official feast day in the Anglican Communion,^[4] as well as in the Lutheran Church.^[5] The Eastern Orthodox Church also celebrates Saint Valentine's Day, albeit on July 6th and July 30th, the former date in honor of the Roman presbyter Saint Valentine, and the latter date in honor of Hieromartyr Valentine, the Bishop of Interamna (modern Terni). In Brazil, the Dia de São Valentim is recognized on June 12.
The day was first associated with romantic love in the circle of Geoffrey Chaucer in the High Middle Ages, when the tradition of courtly love flourished. In 18th-century England, it 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"). Valentine's Day symbols that are used today 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.^[6]