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

Other days

pampering

Pampering Day
artists

Artists Day
bow tie

Bow Tie Day
gallery

Gallery Day
boba

Boba Day
ruby

Ruby Day
polyamory

Polyamory Day
nail polish

Nail Polish Day
latina equal pay

Latina Equal Pay Day
eat what you want

Eat What You Want Day