Oops, it doesn't look like 'watch your back day' is a national day..

Other days

one

One Day
cuddle up

Cuddle Up Day
cat girl

Cat Girl Day
bow tie

Bow Tie Day
pampering

Pampering Day
boba

Boba Day
ponytail

Ponytail Day
singles

Singles Day
azonto is acceptable

Azonto Is Acceptable Day
youth

Youth Day