[fpc-devel] negative TDateTime values and MinDateTime

[Hans-Peter Diettrich]

Michael Schnell schrieb:
> On 08/03/2011 06:55 AM, LacaK wrote:
>> Jonas Maebe  wrote / napísal(a):
>>>
>>> On 02 Aug 2011, at 13:45, LacaK wrote:
>>>
>>>> What do you think, can we change MinDateTime from -693593.0 to 
>>>> -693594.0;
>>>> (to accept 01/01/0001 23:59:59.999)
>>>
> Negative dates are problematic as Year 0 officially does not exist. the 
> first day of Year 1 is directly preceded by the last day of year 1 BC.

There exist other calendars than only the Gregorian one, with their own 
oddities (Maya!), and all of them should be based on an common internal 
date/time type.

IMO a MinDateTime value should be private to every calendar, if ever 
needed, and the global constant should be removed.

DoDi