Oops, it doesn't look like 'security advisor called and texted russian ambassador on same day' is a national day..

Other days

Prescription Drug Take Back Day

Prosecco Day

Eat What You Want Day

Lost Sock Memorial Day

Chocolate Milkshake Day

Cursing Day

My Little Pony Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Ponytail Day

Brow Day