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

Other days

blanket fort

Blanket Fort Day
boyfriend

Boyfriend Day
azonto is acceptable

Azonto Is Acceptable Day
gum

Gum Day
one

One Day
frozen yogurt

Frozen Yogurt Day
self care

Self Care Day
law

Law Day
cat girl

Cat Girl Day
ruby

Ruby Day