[M. Thatcher]

Friday, 15 Oct, 1582 was the next day after Thursday, 2 Oct, 1582

Well, that clears it right up.

[JRandomFreeper]

Until you spend some time studying it, you can't imagine the magnitude of fail in human calendars and timekeeping. The transfer from Julian to Gregorian did change by 13 days and a bit. Depending on where you were, because not all countries changed in the same century.

For dates back around 33 AD, I'd say the first new moon after the vernal equinox, plus or minus a week is plenty close enough for my faith.

There are those that strain at a gnat and swallow a camel. And wars have been fought over it.

/johnny