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

Other days

hannah

Hannah Day
frozen yogurt

Frozen Yogurt Day
martini

Martini Day
stress awareness

Stress Awareness Day
hoodie

Hoodie Day
chocolate milkshake

Chocolate Milkshake Day
singles

Singles Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
ruby

Ruby Day
bubble bath

Bubble Bath Day