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

Other days

gum

Gum Day
lumpy rug

Lumpy Rug Day
ask out your crush

Ask Out Your Crush Day
first love

First Love Day
boy friend

Boy Friend Day
carpenters

Carpenters Day
one

One Day
cuddle up

Cuddle Up Day
china

China Day
ponytail

Ponytail Day