Oops, it doesn't look like 'White Tee And Khaki Cargo Shorts day' is a national day..

Other days

Gallery Day

Comfy Day

Gum Day

Tell A Fairytale Day

Tell Ur Crush You Like Them Day

Prescription Drug Take Back Day

Promposal Day

Buddy Day

Appreciate Yaself A Lil Extra Day

Cuddle Up Day