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

Other days

ruby

Ruby Day
hoodie

Hoodie Day
nae nae

Nae Nae Day
bubble bath

Bubble Bath Day
boy friend

Boy Friend Day
buddy

Buddy Day
fiancee

Fiancee Day
first love

First Love Day
ponytail

Ponytail Day
lumpy rug

Lumpy Rug Day