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

Other days

coffee

Coffee Day
unicorn

Unicorn Day
china

China Day
youth

Youth Day
lumpy rug

Lumpy Rug Day
comfy

Comfy Day
get funky

Get Funky Day
ponytail

Ponytail Day
one

One Day
brow

Brow Day