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

Other days

bow tie

Bow Tie Day
one

One Day
unicorn

Unicorn Day
first love

First Love Day
ponytail

Ponytail Day
boba

Boba Day
tell a fairytale

Tell A Fairytale Day
lumpy rug

Lumpy Rug Day
stud

Stud Day
pampering

Pampering Day