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

Other days

brow

Brow Day
stud

Stud Day
lumpy rug

Lumpy Rug Day
polyamory

Polyamory Day
my little pony

My Little Pony Day
bounce

Bounce Day
law

Law Day
get funky

Get Funky Day
first love

First Love Day
boy friend

Boy Friend Day