Oops, it doesn't look like 'ugly xmas sweater day' is a national day..

Other days

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
special education

Special Education Day
self appreciation

Self Appreciation Day
stud

Stud Day
ormille

Ormille Day
carpenters

Carpenters Day
bow tie

Bow Tie Day
believe

Believe Day
camera

Camera Day
eat what you want

Eat What You Want Day