Valentine's Day

or Valentines Day or Valentine Day


noun

February 14, observed in honor of St. Valentine as a day for the exchange of valentines and other tokens of affection.
Also called Saint Valentine's Day.

British Dictionary definitions for saint valentine's day

Saint Valentine's Day

noun usually abbreviated to: St Valentine's Day

Feb 14, the day on which valentines are exchanged, originally connected with the pagan festival of Lupercalia