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