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

Other days

Raise Awerness Of Zeus Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Healing Day

Ask Out Your Crush Day

Ponytail Day

Eat What You Want Day

Kale Day

Embarrass Your Best Friend Day

Offer Day

My Little Pony Day