Oops, it doesn't look like 'oceanography center open day' is a national day..

Other days

self care

Self Care Day
bow tie

Bow Tie Day
my little pony

My Little Pony Day
law

Law Day
kale

Kale Day
tulip

Tulip Day
lash

Lash Day
blanket fort

Blanket Fort Day
polyamory

Polyamory Day
china

China Day