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

Other days

gum

Gum Day
buddy

Buddy Day
cursing

Cursing Day
stud

Stud Day
bonang

Bonang Day
bounce

Bounce Day
azonto is acceptable

Azonto Is Acceptable Day
ruby

Ruby Day
ask out your crush

Ask Out Your Crush Day
get funky

Get Funky Day