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

Other days

kale

Kale Day
reading

Reading Day
kiss a brunette

Kiss A Brunette Day
bounce

Bounce Day
comfy

Comfy Day
boy friend

Boy Friend Day
stress awareness

Stress Awareness Day
hiv awareness

Hiv Awareness Day
ruby

Ruby Day
book

Book Day