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

Other days

gum

Gum Day
buddy

Buddy Day
stress awareness

Stress Awareness Day
cuddle up

Cuddle Up Day
pick me

Pick Me Day
china

China Day
latina equal pay

Latina Equal Pay Day
prosecco

Prosecco Day
kiss a ginger

Kiss A Ginger Day
book

Book Day