Oops, it doesn't look like 'orang utan day' is a national day..

Other days

stress awareness

Stress Awareness Day
offer

Offer Day
brow

Brow Day
nae nae

Nae Nae Day
ponytail

Ponytail Day
nail polish

Nail Polish Day
boba

Boba Day
coffee

Coffee Day
girl friend

Girl Friend Day
gallery

Gallery Day