Oops, it doesn't look like 'simultaneous earthquake drill day' is a national day..

Other days

My Little Pony Day

Slime Day

Book Day

Chocolate Milkshake Day

Tell Ur Crush You Like Them Day

Healing Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Bounce Day

Embarrass Your Best Friend Day

Frozen Yogurt Day