Oops, it doesn't look like 'watermelon grab some nuts day' is a national day..

Other days

buddy

Buddy Day

bubble bath

Bubble Bath Day

bounce

Bounce Day

coffee

Coffee Day

eat what you want

Eat What You Want Day

fiancee

Fiancee Day

bow tie

Bow Tie Day

Me Day

latina equal pay

Latina Equal Pay Day

comfy

Comfy Day