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

Other days

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
kiss a ginger

Kiss A Ginger Day
first love

First Love Day
latina equal pay

Latina Equal Pay Day
self appreciation

Self Appreciation Day
chocolate milkshake

Chocolate Milkshake Day
ruby

Ruby Day
fiancee

Fiancee Day
believe

Believe Day
me

Me Day