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

Other days

boba

Boba Day
stud

Stud Day
blanket fort

Blanket Fort Day
cuddle up

Cuddle Up Day
one

One Day
self care

Self Care Day
ponytail

Ponytail Day
lost sock memorial

Lost Sock Memorial Day
cat girl

Cat Girl Day
slime

Slime Day