>but most people use the (IMO simpler) 3rd digit rule: the decade is decided by the third digit of the year Most people using something doesn't mean it's right

>but most people use the (IMO simpler) 3rd digit rule: the decade is decided by the third digit of the year Most people using something doesn't mean it's right. Most people could say PI is 3, because it's easier to remember, but it don't change a thing.