Oops, it doesn't look like 'dress on boxing day' is a national day..

Other days

lost sock memorial

Lost Sock Memorial Day

Emoji Day

girl friend

Girl Friend Day

tulip

Tulip Day

gum

Gum Day

coffee

Coffee Day

special education

Special Education Day

one

One Day

stress awareness

Stress Awareness Day

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day