When time is adjusted backward, it changes from DST to EST.
Before 2:00 AM, Security Center uses the DST (UTC-4), while starting from 2:00 AM, it uses the EST (UTC-5), as illustrated below.
|Local time||12:00 AM||1:00 AM||2:00 AM = 1:00 AM||2:00 AM||3:00 AM|
|UTC||4:00 AM||5:00 AM||6:00 AM||7:00 AM||8:00 AM|
Due to the time being adjusted backward, the following behaviors can be observed when playing back or exporting archives:
- The time jumps back by one hour in the timeline. At 1:59:59 AM, the time displayed returns to 1:00:00 AM.
- The end time of a video sequence can be earlier than the start time.
- Exporting archives between 1:00 AM and 2:00 AM always include an additional hour of video. For example, when exporting archives from 1:50 AM to 2:00 AM, the exported sequence will include 1 hour and 10 minutes of video instead of the 10 minutes expected, because the query is made from 5:50 AM to 7:00 AM UTC.