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

Other days

bow tie

Bow Tie Day
bounce

Bounce Day
pampering

Pampering Day
boba

Boba Day
nail polish

Nail Polish Day
one

One Day
cat girl

Cat Girl Day
offer

Offer Day
pick me

Pick Me Day
tell ur crush you like them

Tell Ur Crush You Like Them Day