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

Other days

bow tie

Bow Tie Day
ask out your crush

Ask Out Your Crush Day
camera

Camera Day
my little pony

My Little Pony Day
reading

Reading Day
kale

Kale Day
ormille

Ormille Day
singles

Singles Day
offer

Offer Day
book

Book Day