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

Other days

polyamory

Polyamory Day
pampering

Pampering Day
artists

Artists Day
tell a fairytale

Tell A Fairytale Day
bow tie

Bow Tie Day
reading

Reading Day
cuddle up

Cuddle Up Day
chocolate milkshake

Chocolate Milkshake Day
buddy

Buddy Day
tell ur crush you like them

Tell Ur Crush You Like Them Day