Oops, it doesn't look like 'capital and its surrounding regions spiked drastically on day' is a national day..

Other days

Frozen Yogurt Day

Camera Day

Stress Awareness Day

Boba Day

Brow Day

Book Day

My Little Pony Day

Slime Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Appreciate Yaself A Lil Extra Day