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

Other days

boyfriend

Boyfriend Day
lash

Lash Day
girl friend

Girl Friend Day
lumpy rug

Lumpy Rug Day
hannah

Hannah Day
hoodie

Hoodie Day
bow tie

Bow Tie Day
bounce

Bounce Day
buddy

Buddy Day
kiss a brunette

Kiss A Brunette Day