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

Other days

coffee

Coffee Day
hiv awareness

Hiv Awareness Day
bonang

Bonang Day
gum

Gum Day
ride the wind

Ride The Wind Day
first love

First Love Day
kiss a ginger

Kiss A Ginger Day
offer

Offer Day
healing

Healing Day
carpenters

Carpenters Day