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

Other days

bow tie

Bow Tie Day
kiss a ginger

Kiss A Ginger Day
promposal

Promposal Day
singles

Singles Day
donate your hair

Donate Your Hair Day
pampering

Pampering Day
boba

Boba Day
gum

Gum Day
lash

Lash Day
ormille

Ormille Day