When time is adjusted forward, it changes from Eastern Standard Time (EST) to Daylight Saving Time (DST).
The time shift from EST to DST occurs at 2:00am. Before 2:00am, Security Center uses the EST
(UTC-5). Starting from 2:00am, it uses the DST (UTC-4), as shown in the following table:
| EST | Time change | DST | |||
|---|---|---|---|---|---|
| Local time | 12:00am | 1:00am | 2:00am = 3:00am | 4:00am | 5:00am |
| Offset (hours) | -5 | -5 | -4 | -4 | -4 |
| UTC | 5:00am | 6:00am | 7:00am | 8:00am | 9:00am |
Because the time was adjusted forward, the following behaviors can occur when playing back
video or exporting archives:
- The time shifts forward by 1 hour in the timeline. At 1:59:59am, the displayed time advances to 3:00am.
- There are no archives to export between 2:00am and 3:00am, because this period was skipped.