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

Other days

hannah

Hannah Day
bow tie

Bow Tie Day
chocolate milkshake

Chocolate Milkshake Day
one

One Day
offer

Offer Day
lisp

Lisp Day
self care

Self Care Day
get funky

Get Funky Day
lumpy rug

Lumpy Rug Day
brow

Brow Day