Oops, it doesn't look like 'we want you to be happy day' is a national day..

Other days

carpenters

Carpenters Day
blanket fort

Blanket Fort Day
emoji

Emoji Day
slime

Slime Day
self care

Self Care Day
prescription drug take back

Prescription Drug Take Back Day
frozen yogurt

Frozen Yogurt Day
self appreciation

Self Appreciation Day
me

Me Day
bounce

Bounce Day