How to set RTC Time and TimeZone of Sim800A Manually

  arduino, at-command, c++, gps, sim800

Hello I was using GPS Module of Sim800A. I needed to get the time and location of the gps that I am able to get perfectly. But the time of RTC was coming 00:04:30 01/01/2004 something and that also of GMT +0. Please tell me how I can change the time and GMT of my Module Manually either with AT Commands or with Arduino.

Any help or suggestion will be respected and is promoted
Please help

Source: Windows Questions C++