Daylight saving time (DST) is a practice of advancing clocks by one hour during the summer time so that afternoons have more daylight and mornings have less, saving the energy consumed for lighting.
Before enable DST for USG2000/5000, compatible with USG2250, USG5310 and USG2210configure the system time first. Step 1 Choose System > Configuration > Time. Step 2 Select Automatically adjust clock for daylight saving time (DST). Step 3 Enter or select the parameters listed in Table 4-2. Step 4 Click Apply.