Oops, it doesn't look like 'and i support my migrant brothers and sisters in their day' is a national day..

Other days

Buddy Day

Reading Day

Chocolate Milkshake Day

Carpenters Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Azonto Is Acceptable Day

Promposal Day

Get Funky Day

Unicorn Day

Kiss A Brunette Day