Oops, it doesn't look like 'hit up yo ex day' is a national day..

Other days

martini

Martini Day
book

Book Day
youth

Youth Day
eat what you want

Eat What You Want Day
cuddle up

Cuddle Up Day
tulip

Tulip Day
pampering

Pampering Day
law

Law Day
aloxolt

Aloxolt Day
offer

Offer Day