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

Other days

slime

Slime Day
promposal

Promposal Day
ask out your crush

Ask Out Your Crush Day
my little pony

My Little Pony Day
first love

First Love Day
tulip

Tulip Day
me

Me Day
kiss a brunette

Kiss A Brunette Day
bow tie

Bow Tie Day
ride the wind

Ride The Wind Day