[Bug 15110] Non Gregorian Calendars needs to be supported in the date/datetime input

https://www.w3.org/Bugs/Public/show_bug.cgi?id=15110

Leonard Rosenthol <lrosenth@adobe.com> changed:

           What    |Removed                     |Added
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             Status|RESOLVED                    |REOPENED
         Resolution|DUPLICATE                   |

--- Comment #3 from Leonard Rosenthol <lrosenth@adobe.com> 2011-12-08 19:28:19 UTC ---
The problem with relying on a single calendar model is that conversion between
calendaring systems may rely on additional information that may not be present
and can prevent either general conversion OR inversion.

Consider the conversion of a datetime that occurs early on a day in a lunar
calendar, which is really late in the day on the gregorian.  That's a
reasonably well understood conversion to make. HOWEVER, it's impossible to go
backwards without knowing the actual times for sundown and WHERE the date
conversion is taking place.

See references such as
<http://www.amazon.com/Calendrical-Calculations-Millennium-Edward-Reingold/dp/0521777526>
for more details.

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Received on Thursday, 8 December 2011 19:28:25 UTC