[Solved] Daylight Savings and Recurrence

[Harutyun Ozgun]

Under the help topic "Controls > RadScheduler > Important note about date-time information", in regards to the benefits of using UTC it says:

It is very important to know that RadScheduler processes, stores and returns all date-times in UTC.

This places some additional overhead, but is essential for solving the following problems:

1.       Displaying correct times for the appointments when the clients and/or the server are in different time zones.

2.       Correctly evaluating recurrence rules with respect to Daylight Saving Time.

I understand the first point, but can you explain the second point about daylight savings a little more?  I would think recurrence should work on local times to maintain the same time of day across daylight savings.  Can you give a concrete example of how the recurrence engine works with daylight savings time?

Any help you can give me would be greatly appreciated.
Thanks,
-Paul

[T. Tsonev]

Hello Paul,

You are correct, recurrence rules are evaluated in local time, as set by the TimeZoneOffset property. This was not the case in the very first internal builds of the control and the help article was written at that time. We will revise it to reflect the current behavior of the control.

Thank you for noticing this mistake. Your Telerik points have been updated for your involvement.

Best wishes,
Tsvetomir Tsonev
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center