Valentine's Day or Saint Valentine's Day is a holiday celebrated on February 14 by many people throughout the world. In the English-speaking countries, it is the traditional day on which lovers express their love for each other by sending Valentine's cards, presenting flowers, or offering confectionery. The holiday is named after two among the numerous Early Christian martyrs named Valentine. The day became associated with romantic love in the circle of Geoffrey Chaucer in the High Middle Ages, when the tradition of courtly love flourished.
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