Oops, it doesn't look like 'park and zeus cave day' is a national day..

Other days

lisp

Lisp Day
slime

Slime Day
brow

Brow Day
offer

Offer Day
ruby

Ruby Day
lost sock memorial

Lost Sock Memorial Day
aloxolt

Aloxolt Day
cuddle up

Cuddle Up Day
lash

Lash Day
artists

Artists Day