[Libreoffice-bugs] [Bug 144699] Use proleptic Gregorian consistently for *all* date formatting and recognition

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=144699

--- Comment #2 from Mike Kaganski <mikekaganski at hotmail.com> ---
Damn. Reading ODF 1.4 part 3 sect. 19.341 number:calendar [1]:

> * gregorian: Gregorian calendar with cut-off date 1582-10-04, 1582-10-15
> following. Dates before cut-off date are calculated in Julian proleptic
> calendar [ISO8601], Section 2.4.1. 

It looks like my idea is a crap, and current calendar implementation follows
the standard to the letter.

Then ODF 1.4 part 4 sect. 7.4 Year 1583 [2]:

> Evaluators may choose to support years even earlier than this; such
> evaluators should use a proleptic Gregorian system (continuing the years
> backwards as if the calendar existed in those years).

And here I fail to understand how to connect the two. So common calendar is
defined to use Julian before cut-off; but Calc defines use of proleptic
Gregorian (for formulas?).

[1]
http://docs.oasis-open.org/office/OpenDocument/v1.3/OpenDocument-v1.3-part3-schema.html#a_19_341_number_calendar
[2]
http://docs.oasis-open.org/office/OpenDocument/v1.3/OpenDocument-v1.3-part4-formula.html#a_7_4_Year_1583

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