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

Other days

fiancee

Fiancee Day
brow

Brow Day
girl friend

Girl Friend Day
bow tie

Bow Tie Day
boba

Boba Day
bounce

Bounce Day
singles

Singles Day
tulip

Tulip Day
azonto is acceptable

Azonto Is Acceptable Day
ride the wind

Ride The Wind Day