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

Other days

brow

Brow Day
bonang

Bonang Day
fiancee

Fiancee Day
bow tie

Bow Tie Day
tulip

Tulip Day
special education

Special Education Day
first love

First Love Day
stress awareness

Stress Awareness Day
china

China Day
lash

Lash Day