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

Other days

youth

Youth Day
martini

Martini Day
bounce

Bounce Day
self appreciation

Self Appreciation Day
chocolate milkshake

Chocolate Milkshake Day
brow

Brow Day
cuddle up

Cuddle Up Day
stud

Stud Day
pumpkin

Pumpkin Day
bow tie

Bow Tie Day