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Valentine's Day

or Valentines Dayor Valentine Day

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noun
  1. 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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for saint valentine's day

Saint Valentine's Day

noun usually abbreviated to: St Valentine's Day
  1. Feb 14, the day on which valentines are exchanged, originally connected with the pagan festival of Lupercalia
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012