Oops, it doesn't look like 'fast to begin day' is a national day..

Other days

my little pony

My Little Pony Day
fiancee

Fiancee Day
pampering

Pampering Day
bow tie

Bow Tie Day
law

Law Day
bounce

Bounce Day
cuddle up

Cuddle Up Day
offer

Offer Day
youth

Youth Day
kale

Kale Day