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

Other days

Ponytail Day

Chocolate Milkshake Day

Buddy Day

Nail Polish Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Appreciate Yaself A Lil Extra Day

Unicorn Day

Boba Day

Raise Awerness Of Zeus Day

My Little Pony Day