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

Other days

ponytail

Ponytail Day
prosecco

Prosecco Day
china

China Day
nae nae

Nae Nae Day
cuddle up

Cuddle Up Day
nail polish

Nail Polish Day
eat what you want

Eat What You Want Day
pick me

Pick Me Day
camera

Camera Day
healing

Healing Day