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

Other days

camera

Camera Day
pick me

Pick Me Day
kale

Kale Day
emoji

Emoji Day
first love

First Love Day
nae nae

Nae Nae Day
bow tie

Bow Tie Day
pumpkin

Pumpkin Day
cuddle up

Cuddle Up Day
boy friend

Boy Friend Day