Saint Valentine's Day[sānt]
February 14th is Saint Valentine's Day.
Saint Valentine's Day definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Feb. 14, observed in honor of a martyr of the 3d cent. and, coincidentally, as a day for sending valentines to sweethearts, schoolmates, etc.
Saint Valentine's Day definition by American Heritage Dictionary
February 14, celebrated in various American and European countries by the exchange of valentines or love tokens. Also called Valentine's Day.
Origin: Primarily after Saint Valentine.