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

Other days

promposal

Promposal Day
ask out your crush

Ask Out Your Crush Day
carpenters

Carpenters Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
ruby

Ruby Day
lisp

Lisp Day
frozen yogurt

Frozen Yogurt Day
unicorn

Unicorn Day
offer

Offer Day
self appreciation

Self Appreciation Day