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

Other days

azonto is acceptable

Azonto Is Acceptable Day
blanket fort

Blanket Fort Day
boy friend

Boy Friend Day
ponytail

Ponytail Day
my little pony

My Little Pony Day
prescription drug take back

Prescription Drug Take Back Day
self care

Self Care Day
tulip

Tulip Day
me

Me Day
prosecco

Prosecco Day