[bt-devel] thematic BibleTime splash screens

Sun Jul 10 14:51:34 MST 2011

On Sun, Jul 10, 2011 at 4:34 PM, Jaak Ristioja <jaak at ristioja.ee> wrote:
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> I think we should use the Gregorian calendar, because its
> internationally accepted and and also most used in computer systems. The
> QDate class and friends in Qt also use the Gregorian calendar in all
> locales (see
> http://doc.qt.nokia.com/latest/qdate.html#use-of-gregorian-and-julian-calendars
> ).

Sorry, I wasn't talking about Gregorian vs Julian vs other calendars.
I meant that the day of Easter falls on either of two different dates
depending on one's tradition. Some Orthodox church still follow the
Julian rules, others follow a modified version of the Western rules.
The result is there is not infrequently a discrepancy between when
Roman Catholic and Protestants are celebrating Easter and when the
Orthodox churches are celebrating Easter.  A more complete description
can be found here: http://aa.usno.navy.mil/faq/docs/easter.php along
with a mathematical formula for the calculation of the Western
tradition's date.

If we're happy to stick with only the Western date, then I suppose
that calculation is as good as any. An implementation of the algorithm
can be used here: http://aa.usno.navy.mil/data/docs/easter.php.  If we
would at least like to include our Eastern/Orthodox friends in this,
then someone would need to locate equivalent algorithms for that
calculation. http://en.wikipedia.org/wiki/Computus#Algorithms has such
an algorithm under the title "Meeus Julian Algorithm".  It also
mentions a CPAN module - perhaps there is a similar C or C++ library.

--Greg

>
> A calendar-agnostic possibility would be to make BibleTime just choose a
> random splash screen at startup.
>
> Jaak
>
> On 11.07.2011 00:21, Greg Hellings wrote:
>> The date also depends on one's tradition, East cf West.
>>
>> Greg
>>
>> On Jul 10, 2011 3:57 PM, "Jaak Ristioja" <jaak at ristioja.ee
>> <mailto:jaak at ristioja.ee>> wrote:
>> Great work! I like it, and I think we should include it as a BibleTime
>> splash screen. Does anybody have any serious objections to this?
>>
>> Since the date of easter varies, does anybody have a good formula to
>> calculate whether the current date is in the easter season?
>>
>> God bless!
>> Jaak
>>
>>
>> On 10.07.2011 23:26, Laurent Valentin Jospin wrote:
>>>>> Ok, it's true that a calice is better than a glass.
>>>>>
>>>>> I've prepared the new version that you can find attached
>>>>>
>>>>> Blessings
>>>>>
>>>>> Laurent
>>>>>
>>>>> Le mercredi 06 juillet 2011 à 08:51 -0400, Thomas Abthorpe a écrit :
>>>>>> On 2 July 2011 04:13, Laurent Valentin Jospin
>>>>>> <laurent.valentin.jospin at gmail.com
>>> <mailto:laurent.valentin.jospin at gmail.com>> wrote:
>>>>>>>
>>>>>>> Hello, I've started to work on the new splash screens related to
>>> the Liturgical year.
>>>>>>> I've paint this project for the easter season:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> It's a reference for the last meal of Jesus and the disciples when
>>> they took the holy Communion for the first time.
>>>>>>> I don't know what you think about it. Perhaps, you'd better like
>>> another picture that show the last meal? (in that case I think the one
>>> i've done can also servein another occasion).
>>>>>>> Tell me what you think about it.
>>>>>>>
>>>>>>> blessings
>>>>>>>
>>>>>>> Laurent
>>>>>>>
>>>>>>
>>>>>> Great artwork Laurent
>>>>>>
>>>>>> While not a strong objection, I am with Jaak on substituting in an
>>>>>> opaque chalice.
>>>>>>
>>>>>>
>>>>>> Thomas
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