Oops, it doesn't look like 'gump day' is a national day..

Other days

bow tie

Bow Tie Day
fiancee

Fiancee Day
cursing

Cursing Day
latina equal pay

Latina Equal Pay Day
special education

Special Education Day
reading

Reading Day
gum

Gum Day
healing

Healing Day
law

Law Day
eat what you want

Eat What You Want Day