Oops, it doesn't look like 'follow john on twitter day' is a national day..

Other days

stress awareness

Stress Awareness Day
tulip

Tulip Day
ormille

Ormille Day
believe

Believe Day
bounce

Bounce Day
ruby

Ruby Day
pumpkin

Pumpkin Day
brow

Brow Day
reading

Reading Day
bow tie

Bow Tie Day