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

Other days

china

China Day
appreciate yaself a lil extra

Appreciate Yaself A Lil Extra Day
gum

Gum Day
boy friend

Boy Friend Day
kale

Kale Day
buddy

Buddy Day
law

Law Day
ruby

Ruby Day
get funky

Get Funky Day
ride the wind

Ride The Wind Day