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

Other days

buddy

Buddy Day
eat what you want

Eat What You Want Day
boy friend

Boy Friend Day
first love

First Love Day
bow tie

Bow Tie Day
offer

Offer Day
cat girl

Cat Girl Day
singles

Singles Day
one

One Day
azonto is acceptable

Azonto Is Acceptable Day