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

Other days

tell a fairytale

Tell A Fairytale Day
prosecco

Prosecco Day
promposal

Promposal Day
bounce

Bounce Day
blanket fort

Blanket Fort Day
slime

Slime Day
tulip

Tulip Day
bow tie

Bow Tie Day
pick me

Pick Me Day
youth

Youth Day