Oops, it doesn't look like 'in the same day' is a national day..

Other days

brow

Brow Day
ormille

Ormille Day
fiancee

Fiancee Day
bonang

Bonang Day
youth

Youth Day
one

One Day
aloxolt

Aloxolt Day
ride the wind

Ride The Wind Day
cuddle up

Cuddle Up Day
polyamory

Polyamory Day