Oops, it doesn't look like 'sit the fuck down day' is a national day..

Other days

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
eat what you want

Eat What You Want Day
kale

Kale Day
brow

Brow Day
singles

Singles Day
stress awareness

Stress Awareness Day
artists

Artists Day
stud

Stud Day
special education

Special Education Day
get funky

Get Funky Day