Oops, it doesn't look like 'voluntary blood donation voluntary blood donation day' is a national day..

Other days

pumpkin

Pumpkin Day
blanket fort

Blanket Fort Day
kiss a brunette

Kiss A Brunette Day
eat what you want

Eat What You Want Day
boba

Boba Day
offer

Offer Day
cuddle up

Cuddle Up Day
lash

Lash Day
tulip

Tulip Day
self appreciation

Self Appreciation Day