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

Other days

stud

Stud Day
tulip

Tulip Day
bow tie

Bow Tie Day
youth

Youth Day
artists

Artists Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
pampering

Pampering Day
ponytail

Ponytail Day
cursing

Cursing Day
hot chocolate

Hot Chocolate Day