Oops, it doesn't look like 'event or day' is a national day..

Other days

self care

Self Care Day
ruby

Ruby Day
boyfriend

Boyfriend Day
ride the wind

Ride The Wind Day
my little pony

My Little Pony Day
bubble bath

Bubble Bath Day
cursing

Cursing Day
bow tie

Bow Tie Day
artists

Artists Day
comfy

Comfy Day