Oops, it doesn't look like 'run in spandex day' is a national day..

Other days

Lost Sock Memorial Day

My Little Pony Day

Get Funky Day

Appreciate Yaself A Lil Extra Day

Hiv Awareness Day

Cuddle Up Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Fiancee Day

Stress Awareness Day

China Day