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

Other days

martini

Martini Day
appreciate yaself a lil extra

Appreciate Yaself A Lil Extra Day
lisp

Lisp Day
ponytail

Ponytail Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
artists

Artists Day
blanket fort

Blanket Fort Day
offer

Offer Day
latina equal pay

Latina Equal Pay Day
hiv awareness

Hiv Awareness Day