Days, Months, Seasons, and Years

In the past, when you did not know God, you served as slaves beings which in reality are non-gods. But now you do know God, and, more than that, you are known by God. So how is it that you turn back again to those weak and miserable elemental spirits? Do you want to enslave yourselves to them once more? You observe special days, months, seasons and years! I fear for you that my work among you has been wasted! Galatians 4:8-11

All Saints' Day
Halloween
Lent
Epiphany
Candlemas
Valentine's Day
Yule
Ash Wednesday
Samhain
May Day
Easter
Mardi Gras
Etc., etc...