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

Other days

cat girl

Cat Girl Day
bow tie

Bow Tie Day
singles

Singles Day
blanket fort

Blanket Fort Day
get funky

Get Funky Day
ride the wind

Ride The Wind Day
offer

Offer Day
kale

Kale Day
artists

Artists Day
nail polish

Nail Polish Day