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

Other days

youth

Youth Day
book

Book Day
blanket fort

Blanket Fort Day
stud

Stud Day
bow tie

Bow Tie Day
bubble bath

Bubble Bath Day
carpenters

Carpenters Day
chocolate milkshake

Chocolate Milkshake Day
get funky

Get Funky Day
first love

First Love Day