How do I get correct date and time from googleapi from same timezone and different time

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C#3.5

Hi,

I am creating a service that take Latitude and longitude and Timestamp as input and use GoogleAPI and send me correct timeZone. By using this timezone I am able to get the date and time for that lat long.

Its working fine but Now I am facing some problem that I am unable to resolve it.
My problem is Both Dubai and Qatar is at same TimeZone with different time. so when I calculate time as per TimeZone both are showing same time. So I need some solution for it.

What I have tried:

protected string getTimeZoneFroPaidApi(string latitude, string longitude, int TimeStamp)
   {
       string str = "";
       try
       {
           XElement xelement = XElement.Load(string.Format("https://maps.googleapis.com/maps/api/timezone/xml?location={0},{1}×tamp={2}&key=*********", (object)latitude, (object)longitude, (object)TimeStamp));
           str = !(xelement.Element((XName)"status").Value == "OK") ? "Error: " + xelement.Element((XName)"status").Value : string.Format("{0}", (object)xelement.Element((XName)"raw_offset").Value);
       }
       catch (Exception ex)
       {
           Logger.WriteLogWS(ex, "V2_SERVICE", "GET_TIME_ZONE");
       }
       return str;
   }

It is a paid GoogleAPI and I have doubt why the third parameter is required. Now I am sending current Second from System date as third parameter.
How can I differentiate the time with same timezone.