Oops, it doesn't look like 'orange heart day' is a national day..

Other days

pampering

Pampering Day
boba

Boba Day
lisp

Lisp Day
lash

Lash Day
donate your hair

Donate Your Hair Day
ride the wind

Ride The Wind Day
offer

Offer Day
hiv awareness

Hiv Awareness Day
cat girl

Cat Girl Day
law

Law Day