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

Other days

get funky

Get Funky Day
youth

Youth Day
bounce

Bounce Day
china

China Day
stud

Stud Day
promposal

Promposal Day
gum

Gum Day
buddy

Buddy Day
cuddle up

Cuddle Up Day
eat what you want

Eat What You Want Day