Oops, it doesn't look like 'flypast to mark ve day' is a national day..

Other days

brow

Brow Day
camera

Camera Day
one

One Day
blanket fort

Blanket Fort Day
bubble bath

Bubble Bath Day
stud

Stud Day
bow tie

Bow Tie Day
singles

Singles Day
buddy

Buddy Day
cuddle up

Cuddle Up Day