Oops, it doesn't look like 'blood donor week and you can help by taking just an hour from your day' is a national day..

Other days

Kale Day

Aloxolt Day

Ride The Wind Day

Ask Out Your Crush Day

Lumpy Rug Day

Get Funky Day

Embarrass Your Best Friend Day

Boba Day

Raise Awerness Of Zeus Day

First Love Day