Oops, it doesn't look like 'award many more happy returns of the day' is a national day..

Other days

Tell Ur Crush You Like Them Day

Unicorn Day

Ask Out Your Crush Day

Appreciate Yaself A Lil Extra Day

Promposal Day

Raise Awerness Of Zeus Day

Pick Me Day

Hot Chocolate Day

Kale Day

Embarrass Your Best Friend Day