Oops, it doesn't look like 'going back in day' is a national day..

Other days

buddy

Buddy Day
reading

Reading Day
kale

Kale Day
camera

Camera Day
hannah

Hannah Day
ask out your crush

Ask Out Your Crush Day
law

Law Day
cursing

Cursing Day
blanket fort

Blanket Fort Day
my little pony

My Little Pony Day