Oops, it doesn't look like 'highway opens for one way traffic after a day' is a national day..

Other days

Bubble Bath Day

Azonto Is Acceptable Day

Lash Day

Kiss A Ginger Day

Prosecco Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Cursing Day

Bow Tie Day

Unicorn Day

Tell A Fairytale Day