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

Other days

kale

Kale Day
bow tie

Bow Tie Day
pampering

Pampering Day
carpenters

Carpenters Day
ask out your crush

Ask Out Your Crush Day
bonang

Bonang Day
law

Law Day
bubble bath

Bubble Bath Day
bounce

Bounce Day
unicorn

Unicorn Day