> On Dec 18, 2019, at 11:19, Carl Hoefs via Cocoa-dev 
> <cocoa-dev@lists.apple.com> wrote:
> 
> I have a macOS daemon that uses NSTimers for scheduling user event 
> reminders. 
> 
> This works well except for abrupt time changes:
>  (1) the user explicitly changes the date/time
>  (2) the user crosses into a different time zone
>  (3) daylight saving time comes/goes. 
> Then I need to recalculate the timers based on the new current time.
> 
> The Apple docs don't list any NSWorkspace notifications related to the above. 
> How can I handle these cases?

Look in a different header, one related to time; NSDate.h, where you’ll find 
NSSystemClockDidChangeNotification.

Steve via iPhone


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