On 2017-01-02 18:55, Brooks Harris wrote about the correspondence
| Date | MJD | NTP | NTP Timestamp | Epoch |
| 4 Oct 1582 | -100,851 | -3 | 2,873,647,488 | Last day
Julian |
Ah, I think the table is correct - that's the infamous reset made by
the Gregorian calendar to correct accumulated inaccuracies in the
Julian and also, I believe, counted days at midnight, not noon, as
Julian did (does).
Sure, the Julian date of the day before the day with Gregorian date
1582-10-25
is 1582 Oct 04 -- but the epoch given in the table with the MJD
value and the
NTP timestamp values is obviously 10 days earlier: they all indicate
Julian date
1582 Sep 24 and Gregorian date 1582-10-04, as I have noted earlier.
The table indicates the (not usual) confusion about "omitted days" where
it is unclear which numbers should be decreased (or increased) by ten.
I do not want to be sarcastic but my managers would refuse to buy
software
when the spec (already) contains such blunders.
And dates in the Julian calendar are taken to begin at midnight, as
in the
Gregorian calendar. It is the Julian day numbers used in astronomy that
take integral values at noon epochs -- but they have nothing to do with
the Julian calendar, except perhaps for the origin of the name.
Michael Deckers.
_______________________________________________
LEAPSECS mailing list
[email protected]
https://pairlist6.pair.net/mailman/listinfo/leapsecs
