Blackberry Daylight Savings Time Patch

Just download the patch at blackberry.com because I’m not even going to try explain why it’s a good idea. Apparently, though, RIM has decided to give you a list of hypothetical situations. I attempted to paraphrase it, but it made my head spin, so copy and paste seemed like the way to go:

Risks of not upgrading the BlackBerry environment

Appointments and their reminders might appear 1 hour late on your BlackBerry device if the appointments start in one of the following windows in any year:

Between the second Sunday in March and the first Sunday in April (for example, March 11 2007 to April 1 2007)
Between the last Sunday in October and the first Sunday in November (for example, October 28 2007 to November 4 2007)
NOTE: Anyone living in or traveling to Mexico will not be impacted by the DST change as Mexico is not changing the DST start and end dates. However, any Mexico, Latin America, European or Asia-Pacific users who book meetings with US or Canadian-based users will also be impacted by this transition for those meetings unless patches are applied.

In addition to the display time on the BlackBerry® device not transitioning correctly when the new Daylight Saving Time (DST) start and ends dates occur, there is an impact to the calendar features on the BlackBerry device.

The way a calendar appointment is affected depends on whether it was created using an old DST table (i.e. no patch applied) with historical DST information or using a new DST table (i.e. after patch is applied) with the updated 2007 DST information.

Scenarios
Scenario #1: Any single instance or recurring appointments that were created using the new DST table, start in the specified windows, and display using an old DST table, appear 1 hour early.

Example 1
An appointment that starts on March 15 2007, and was created on a computer that has been updated with the 2007 DST information (including any server updates required to support the new 2007 DST table). The computer is wirelessly synchronized to a BlackBerry device that has not been updated with the new 2007 DST table.
Result: This appointment will appear correctly on the computer and 1 hour early on the BlackBerry device.

Example 2
An appointment that starts on March 20 2007, and was created on a BlackBerry device that has been updated with the 2007 DST information. The BlackBerry device is wirelessly synchronized to a computer that has not been updated with the new 2007 DST table (including any server updates required to support the new 2007 DST table).
Result: This appointment will appear correctly on the BlackBerry device and 1 hour early on the computer.
Scenario #2: Any single instance or recurring appointments that were created using the old DST table and start in the specified windows, and display using the new DST table, appear 1 hour late.

Example 1
An appointment that starts on March 23 2007, and was created on a computer that has not been updated with the 2007 DST information. The computer is wirelessly synchronized to a BlackBerry device that has been updated with the new 2007 DST table.
Result: This appointment will appear correctly on the computer and 1 hour late on the BlackBerry device.

Example 2
An appointment that starts on March 19 2007, and was created on a BlackBerry device that has not been updated with the 2007 DST information. The BlackBerry device is wirelessly synchronized to a computer that has been updated with the new 2007 DST table (including any server updates required to support the new 2007 DST table).
Result: This appointment will appear correctly on the BlackBerry device and 1 hour late on the computer.
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