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

Other days

bow tie

Bow Tie Day
azonto is acceptable

Azonto Is Acceptable Day
chocolate milkshake

Chocolate Milkshake Day
youth

Youth Day
law

Law Day
promposal

Promposal Day
bounce

Bounce Day
martini

Martini Day
boba

Boba Day
bonang

Bonang Day