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

Other days

comfy

Comfy Day

Emoji Day

hannah

Hannah Day

my little pony

My Little Pony Day

girl friend

Girl Friend Day

stress awareness

Stress Awareness Day

gum

Gum Day

bow tie

Bow Tie Day

embarrass your best friend

Embarrass Your Best Friend Day

artists

Artists Day