Oops, it doesn't look like 'mourning because of the defeat of isis in syria day' is a national day..

Other days

Kale Day

My Little Pony Day

Promposal Day

Bow Tie Day

Polyamory Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Cuddle Up Day

Believe Day

Bubble Bath Day

Donate Your Hair Day