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

Other days

bow tie

Bow Tie Day
offer

Offer Day
coffee

Coffee Day
bubble bath

Bubble Bath Day
azonto is acceptable

Azonto Is Acceptable Day
first love

First Love Day
cursing

Cursing Day
martini

Martini Day
hoodie

Hoodie Day
fiancee

Fiancee Day