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

Other days

promposal

Promposal Day
ormille

Ormille Day
cuddle up

Cuddle Up Day
one

One Day
offer

Offer Day
raise awerness of zeus

Raise Awerness Of Zeus Day
coffee

Coffee Day
gum

Gum Day
latina equal pay

Latina Equal Pay Day
martini

Martini Day