Oops, it doesn't look like 'i am single day' is a national day..

Other days

carpenters

Carpenters Day
book

Book Day
pumpkin

Pumpkin Day
cuddle up

Cuddle Up Day
bonang

Bonang Day
bubble bath

Bubble Bath Day
bounce

Bounce Day
lumpy rug

Lumpy Rug Day
eat what you want

Eat What You Want Day
brow

Brow Day