Oops, it doesn't look like 'slut day' is a national day..

Other days

healing

Healing Day
tulip

Tulip Day
kiss a ginger

Kiss A Ginger Day
aloxolt

Aloxolt Day
latina equal pay

Latina Equal Pay Day
boy friend

Boy Friend Day
frozen yogurt

Frozen Yogurt Day
hoodie

Hoodie Day
boba

Boba Day
nail polish

Nail Polish Day