Saint Valentine's Day[1] (commonly shortened to Valentine's Day[1][2][3]) is an annual holiday held on February 14 celebrating love and affection between intimate companions.[1][3] The holiday is named after one or more early Christian martyrs named Valentine and was established by Pope Gelasius I in 496 AD. It is traditionally a day on which lovers express their love for each other by presenting flowers, offering confectionery, and sending greeting cards (known as "valentines"). The holiday first became associated with romantic love in the circle of Geoffrey Chaucer in the High Middle Ages, when the tradition of courtly love flourished.
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 largely given way to mass-produced greeting cards.[4]
The sending of Valentines was a fashion in nineteenth-century Great Britain, and, in 1847, Esther Howland developed a successful business in her Worcester, Massachusetts home with hand-made Valentine cards based on British models. The popularity of Valentine cards in 19th century America, where many Valentine cards are now general greeting cards rather than declarations of love, was a harbinger of the future commercialization of holidays in the United States.[5] It's considered one of the Hallmark holidays.
The U.S. Greeting Card Association estimates that approximately one billion valentines are sent each year worldwide, making the day the second largest card-sending holiday of the year, behind Christmas. The association estimates that, in the US, men spend on average twice as much money as women.[6]