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

Other days

hoodie

Hoodie Day
prosecco

Prosecco Day
believe

Believe Day
nail polish

Nail Polish Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
hiv awareness

Hiv Awareness Day
frozen yogurt

Frozen Yogurt Day
self appreciation

Self Appreciation Day
donate your hair

Donate Your Hair Day
tell a fairytale

Tell A Fairytale Day