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

Other days

martini

Martini Day
brow

Brow Day
bow tie

Bow Tie Day
believe

Believe Day
gum

Gum Day
kale

Kale Day
book

Book Day
pick me

Pick Me Day
offer

Offer Day
cat girl

Cat Girl Day