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

Other days

ormille

Ormille Day
ruby

Ruby Day
my little pony

My Little Pony Day
me

Me Day
martini

Martini Day
boy friend

Boy Friend Day
bow tie

Bow Tie Day
blanket fort

Blanket Fort Day
boba

Boba Day
lumpy rug

Lumpy Rug Day