Oops, it doesn't look like 'seokjin photobombing day' is a national day..

Other days

Lost Sock Memorial Day

Bow Tie Day

Believe Day

Martini Day

Prescription Drug Take Back Day

Azonto Is Acceptable Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Polyamory Day

Nae Nae Day

Nail Polish Day