The article below will explain this subject:
Title: Valentine's Day -- Christian Custom or Pagan Pageantry?
Author: Herman L Hoeh
Publication: The Good News
Publisher: Worldwide Church of God
Editor-in-Chief: Herbert W Armstrong
Issue: Feb 1985
Number: Vol 32, No 2
Page: 11
Keywords: Genesis 10:9, Valentine's Day, St. Valentine's Day, Valentine,
Christianity, going steady, Nimrod, Semiramis, Pope Gelasius, Lupercus,
Lupercalia, wolf hunter, February 14, February 15, heart, hearts, winter
solstice, Pan, Arcadian god of light, Baal, idolatry, purification,
rites of purification, sacrificial animals, thongs, sungod, Rome, Roman,
pagan customs
Source: The Good News Magazine -- Feb 1985
Type: Article
Type Media: PDF
Article:
https://www.cog-hwa.org/pub/gn/1985/GN-1985-02_HLH_Valentines_Day_Christian_Custom_or_Pagan_Pageantry.pdf
Entire Issue:
https://www.cog-hwa.org/pub/gn/1985/GN-1985-02.pdf
Title: Pagan Holidays -- or God's Holy Days -- Which?
Author: Herbert W Armstrong
Date: 1976
Type: Booklet
Type Media: PDF
https://cog-hwa.org/pub/bb/holydays.pdf