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

Other days

prescription drug take back

Prescription Drug Take Back Day
me

Me Day
lash

Lash Day
artists

Artists Day
cuddle up

Cuddle Up Day
boy friend

Boy Friend Day
emoji

Emoji Day
bow tie

Bow Tie Day
one

One Day
stud

Stud Day