Oops, it doesn't look like 'butthole appreciation day' is a national day..

Other days

boba

Boba Day
self appreciation

Self Appreciation Day
cuddle up

Cuddle Up Day
kale

Kale Day
blanket fort

Blanket Fort Day
self care

Self Care Day
girl friend

Girl Friend Day
offer

Offer Day
donate your hair

Donate Your Hair Day
azonto is acceptable

Azonto Is Acceptable Day