Daylight Saving Time

Hello Everyone,

This post is mostly aimed to my Israeli crowd (because this problem concerns them the most).
It's about the Daylight saving time issue in MOSS and Sharepoint 2010 in the year 2011.

Sharepoint (or moss) dosen't look at the OS date as regarding to Daylight Saving time, it looks at an XML file located in : C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\Config\TIMEZONE.xml.

This years Changes include the following changes :

<.Bias>-120<./Bias>

<.StandardTime>
<.Bias>0<./Bias>
<.Date>
<.Month>9<./Month>
<.Day>2<./Day>
<.Hour>2<./Hour>
<./Date>
<./StandardTime>
<.DaylightTime>
<.Bias>-60<./Bias>
<.Date>
<.Month>4<./Month>
<.Day>1<./Day>
<.Hour>2<./Hour>
<.DayOfWeek>6<./DayOfWeek>
<./Date>
<./DaylightTime>
<./TimeZone>

That's because the change is due on the night between Thursday and Friday at 2 AM in the date 4.1.2011.

There is also a little bug that a co worker of mine showed me, you can view it in his Blog.

For those of you who dosen't understand Hebrew i'll reveal the bug here.

Israel resides in the GMT+2 Time Line, which means we are -120 minutes away from the Grinich line.

Therefore the data -120 <.Bias>-120<./Bias>

Month being the month the clock changes to daylight saving time  <.Month>4<./Month>

Hour representing Hour <.Hour>2<./Hour>

DayOfTheWeek representing the day of the week it will change. <.DayOfWeek>6<./DayOfWeek>

And get this : DAY representing the week the change will occur (yes the week not the day) <.Day>1<./Day>


The changes to the XML file needs to be done on all the servers in the farm, and don't forget to backup your old XML files just in case.


Here is what Microsoft have to say about the Issue.

Happy transition to the year 2011 DST :-)