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

Other days

tulip

Tulip Day
stress awareness

Stress Awareness Day
nae nae

Nae Nae Day
camera

Camera Day
lumpy rug

Lumpy Rug Day
stud

Stud Day
ask out your crush

Ask Out Your Crush Day
cat girl

Cat Girl Day
comfy

Comfy Day
hiv awareness

Hiv Awareness Day