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

Other days

singles

Singles Day
self care

Self Care Day
promposal

Promposal Day
unicorn

Unicorn Day
cuddle up

Cuddle Up Day
hiv awareness

Hiv Awareness Day
artists

Artists Day
azonto is acceptable

Azonto Is Acceptable Day
martini

Martini Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day