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

Other days

get funky

Get Funky Day
boy friend

Boy Friend Day
hoodie

Hoodie Day
buddy

Buddy Day
boyfriend

Boyfriend Day
coffee

Coffee Day
bow tie

Bow Tie Day
eat what you want

Eat What You Want Day
reading

Reading Day
book

Book Day