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

Other days

youth

Youth Day
nae nae

Nae Nae Day
polyamory

Polyamory Day
kale

Kale Day
azonto is acceptable

Azonto Is Acceptable Day
no bra

No Bra Day
bow tie

Bow Tie Day
china

China Day
chocolate milkshake

Chocolate Milkshake Day
boba

Boba Day