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

Other days

youth

Youth Day
brow

Brow Day
boba

Boba Day
comfy

Comfy Day
book

Book Day
girl friend

Girl Friend Day
kiss a brunette

Kiss A Brunette Day
gum

Gum Day
first love

First Love Day
donate your hair

Donate Your Hair Day