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

Other days

first love

First Love Day
raise awerness of zeus

Raise Awerness Of Zeus Day
eat what you want

Eat What You Want Day
lash

Lash Day
self appreciation

Self Appreciation Day
ruby

Ruby Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
boy friend

Boy Friend Day
prescription drug take back

Prescription Drug Take Back Day
artists

Artists Day