Time and set time zone:

iGPSPORT recommends you set your device to local time zone .

Once the time zone is correctly set, the time will calibrated automatically when GPS signal is well located.

For example, we are located in China, and the time zone should be set to +8:00.

Then time will calibrated to the current time 10:30 once the GPS signal is well located.

For a list of time zones by country, see List of time zones by country.

Steps to set time zone:

Click Setting>System>Time Setting 

Rlated Articles: 

1. My iGS618 / iGS620 Can't Show Correct Time

2. Locate GPS Signal for My iGS618 / iGS620

More details about time zone:

What is the difference in time between time zones?

Time Difference from UTC : 
UTC time changes 1 hour forward and backward corresponding to a 1-hour difference in mean solar time for every 15 degrees east or west of the prime meridian (0° longitude) in Greenwich, London, United Kingdom.

The offset is expressed as either UTC- or UTC+ and the number of hours and minutes.

Each time zone is 15 degrees wide and there's a one hour difference between each one.

Depending on the distance -- east or west -- from the Greenwich Meridian you must either add or subtract the appropriate time for every 15 degree interval.

More details about time zone, see video time zones