days-between-dates Solver equation for 17b

[Dieter]

(10-08-2018 06:40 AM)brickviking Wrote:  To the best of my knowledge, the Julian calendar system ended up with leap years every four years (thank Augustus for that), regardless of if the century could be divided by four or not.

Regardless of the century being divisible by 100 (or 400) or not. Yes, this was the rule, but in the early years it was applied incorrectly: instead of a leap year after three common years it was a leap year every three years. It took several decades until the correct rule was in use.

(10-08-2018 06:40 AM)brickviking Wrote:  Given that the year actually started in March (not January like currently), this was not really considered an issue. They simply incremented the year in March (I believe).

You can still see that in the names of the months: September, October, November and December are derived from the Latin septem = seven, octo = eight, novem = nine and decem = ten.

Dieter