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

Other days

lost sock memorial

Lost Sock Memorial Day
prosecco

Prosecco Day
promposal

Promposal Day
kale

Kale Day
pick me

Pick Me Day
hiv awareness

Hiv Awareness Day
mean girls

Mean Girls Day
lisp

Lisp Day
kiss a ginger

Kiss A Ginger Day
lash

Lash Day