Oops, it doesn't look like 'debt in a single day' is a national day..

Other days

buddy

Buddy Day
believe

Believe Day
youth

Youth Day
ride the wind

Ride The Wind Day
kale

Kale Day
gum

Gum Day
pick me

Pick Me Day
bow tie

Bow Tie Day
frozen yogurt

Frozen Yogurt Day
hiv awareness

Hiv Awareness Day