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

Other days

youth

Youth Day

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day

tulip

Tulip Day

bow tie

Bow Tie Day

ask out your crush

Ask Out Your Crush Day

lisp

Lisp Day

Emoji Day

ponytail

Ponytail Day

kale

Kale Day

eat what you want

Eat What You Want Day