[Vtigercrm-developers] Day light saving time in Calendar Module

[nicolas GASNIER]

Hi developers,

I have finally worked on this issue and found the problem. Fortunately, it is not a major problem in the core date classes. It was just a basic display problem. I filled a bug report and submitted a patch here :

http://trac.vtiger.com/cgi-bin/trac.cgi/ticket/7595

I wasn't able to check if the pre-6.0 version has the problem because the calendar view doesn't seem to work now. But the code for the timeString function that caused the problem is the same, so there is a very high probability that 6.0 has the problem too. May someone confirm ?

Regards.


Nicolas GASNIER
Développeur
HOLDIS AGRIDIS
1 rue des MORELLES
ZA Euro Val de Loire
41330 FOSSE
Tél : 02 54 81 48 44

De : vtigercrm-developers-bounces at lists.vtigercrm.com [mailto:vtigercrm-developers-bounces at lists.vtigercrm.com] De la part de nicolas GASNIER
Envoyé : mercredi 31 octobre 2012 17:28
À : vtigercrm-developers at lists.vtigercrm.com
Objet : [Vtigercrm-developers] Day light saving time in Calendar Module

Hi everyone,

I'm facing a critical issue on the Calendar module for us in Europe. Two times in the year we change time so that in winter we are GMT+1 and in summer we are GMT+2. This is automatically handled by the system timezone (i.e. Europe/Brussels Madrid Paris) but VTiger seems to have a global behavior about that. The last weekend was the winter was daylight saving time... and the problem arises ! Now, all calendar events before the time change date are now displayed 1 hours before the actual time...

VTiger seems to be using the current system date to convert the time to the user timezone, and not the actual date of the event. So it handles all event like if it is in winter time, which is wrong. It should handle this using the actual date of the event.

So I had a quick look in the code in order to try a correction, but it seems very complicated to change something without breaking something else. I think it has something to do with the DateTimeField class, but I can't figure out the impact if I modify this class. And that may not be the only place to change something, there may be a lot of things in the layout generation code to change.

Does anyone have any clue  ?

I'm using VTiger 5.4 now, is that problem solved in the soon coming next release ?

Thank you very much.

Nicolas GASNIER
Développeur
HOLDIS AGRIDIS
1 rue des MORELLES
ZA Euro Val de Loire
41330 FOSSE
Tél : 02 54 81 48 44


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