Oops, it doesn't look like 'have a coca cola day' is a national day..

Other days

bonang

Bonang Day
gum

Gum Day
kale

Kale Day
offer

Offer Day
promposal

Promposal Day
camera

Camera Day
cat girl

Cat Girl Day
first love

First Love Day
get funky

Get Funky Day
fiancee

Fiancee Day