What I did to prep my Blackberry for the Daylight Savings Adjustment:

1. Looked in Options > About >
…then saw my Blackberry 7520 was on a version too old to apply the DST patch (needs to be 4.1.0.292 or higher)
2. I downloaded the Blackberry Desktop Manager software version 4.1 from this site:
…for Telus: https://www.blackberry.com/SoftwareDownload/index.jsp?client=dB5bZddMq
…for Rogers: https://www.blackberry.com/SoftwareDownload/index.jsp?client=biERdLcdT
… for Bell Mobility: https://www.blackberry.com/SoftwareDownload/index.jsp?client=aMlbMFchE
3. I installed the software, then connected my Blackberry to the computer via USB and did a BackUp
4. Impasse! I went to download the latest Blackberry Handheld software, only to find out that it is the same version as I had before, so what’s the point?
5. Ok, next step: I closed the Blackberry Desktop Manager, and downloaded the DST Patch from this site: http://www.blackberry.com/DST2007/patch/desktop/dst_update_loader.shtml
I normally use Firefox however this one need Internet Explorer with the ActiveX controls on
6. When instructed, I connected the Blackberry to the computer via USB cable and clicked the button to download the patch.
7. It took a good 10 minutes or so for the Berry to restart after loading the patch. It had that spinning hourglass on the screen for a long time.
8. It finally started back up and was great! I knew for sure the patch was on there because I could go to Options and see 2007 DST Patch in the list.

How to Update Your Blackberry for Daylight Savings: Do this before Sunday March 11, 2007
Translated into French by: Ginger Blythin