Not forgetting the 12 Disciples, the Dirty Dozen, the 12 Good Men [or Ladies] and True in our Courtroom juries, the 12 Signs of the Zodiac, a Dozen a Day [ = 0.000138888889 hertz!
], or a dozen red roses
for that special lady.
Let's be honest, the 10 Days of Christmas just doesn't sound right either, does it?