Oops, it doesn't look like 'flag costume for his pet dog on republic day' is a national day..

Other days

Ask Out Your Crush Day

Pumpkin Day

Slime Day

Tell Ur Crush You Like Them Day

Hoodie Day

Nail Polish Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Nae Nae Day

Lisp Day

Boyfriend Day