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

Other days

fiancee

Fiancee Day
aloxolt

Aloxolt Day
offer

Offer Day
unicorn

Unicorn Day
artists

Artists Day
frozen yogurt

Frozen Yogurt Day
mean girls

Mean Girls Day
cuddle up

Cuddle Up Day
nae nae

Nae Nae Day
bow tie

Bow Tie Day