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

Other days

girl friend

Girl Friend Day

eat what you want

Eat What You Want Day

chocolate milkshake

Chocolate Milkshake Day

camera

Camera Day

offer

Offer Day

boy friend

Boy Friend Day

Me Day

ruby

Ruby Day

ponytail

Ponytail Day

ask out your crush

Ask Out Your Crush Day