Hi. That's just the date/time when DST starts and ends (Daylight Saving Time, clocks going forward or backward 1h), so nothing to do with cameras coming on or off.
If you use NTP for time synchronisation, you shouldn't need to touch this.

Best posts made by Seb_526812765704330
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RE: What is the Start and End time?
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Plaback event from notification
Hi. When receiving a notification of movement (person, etc..), what is the expected behaviour when tapping on this notification ?
I thought that automatically the app would send me to the playback of the related event, but for me it's always going to live view, and then I have to sort through events playback.
I can understand it's going to live view when the notification has just been received (less than a minute ago for instance), but on older ones, I was expecting it to go to the corresponding event playback.
I may be wrong, but I thought this was working before, and only started to realise this behaviour recently (maybe since daylight saving time came into the picture end of March in the UK ?)