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

Other days

pumpkin

Pumpkin Day

special education

Special Education Day

nail polish

Nail Polish Day

Me Day

nae nae

Nae Nae Day

bubble bath

Bubble Bath Day

stud

Stud Day

comfy

Comfy Day

blanket fort

Blanket Fort Day

offer

Offer Day