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

Other days

hannah

Hannah Day
bow tie

Bow Tie Day
one

One Day
me

Me Day
stress awareness

Stress Awareness Day
bubble bath

Bubble Bath Day
kiss a ginger

Kiss A Ginger Day
emoji

Emoji Day
latina equal pay

Latina Equal Pay Day
brow

Brow Day