Swann 8 Channel DVR H.264 - Manual (Page 55)

53 Remember: After making changes to the settings press/click the APPLY button.
Configuring DST (Daylight Savings Time) Settings
As the standards for daylight savings differ from country to country, and often state
to state, you might need to manually tell the DVR exactly when it commences and
ends in your locality. First, turn DST on. We suggest setting the Daylight Saving Time
Mode to Date, and manually entering the dates and times that daylight savings time
applies to and from, in your locality.
NOTE: Some NTP servers are NOT fully compatible with DST. This may cause your system
to double-count adding one or removing one more hour than they should, or cancel
each other out. You may need to intentionally change your time zone to compensate, or
simply not use NTP and DST simultaneously.
Remember to APPLY your changes
Unlike other menu screens on the DVR, the Date and Time menu will not
ask you to confirm your changes upon exit. Instead, any changes made are
automatically discarded unless the APPLY button is selected.