Hello. Do you know the Fairfield's congruence?

**Firstly, if m is 1 or 2, compute y=y-1,m=m+12.** Then calculating this formula, you can get the number of days between an arbitrary date and 01/01/0001.

In Japan, this formula is known as the Fairfield's congruence, but I have never seen the foreign people who have been talking about it.

It is mentioned in only the Japanese Wikipedia's page of "Zeller's congruence" below. http://ja.wikipedia.org/wiki/%E3%83%84%E3%82%A7%E3%83%A9%E3%83%BC%E3%81%AE%E5%85%AC%E5%BC%8F

Do you know who Fairfield is? I don't know.

Do you know a famous formula like the Fairfield's congruence?