HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation Windows server registry key and its field ActiveTimeBias will return the offset in minutes from GMT for the machine that you are running on.
currentdateandtime = now()
set oShell = CreateObject("WScript.Shell")
windowregistrykey = "HKEY_LOCAL_MACHINE\System\CurrentControlSet\" &_
"Control\TimeZoneInformation\ActiveTimeBias"
'offset from UTC for the time zone that your server is set to
offsetMin = oShell.RegRead(atb)
newdatetime = dateadd("n", offsetMin, od)
ISTtime=DateAdd("n",330,newdatetime)
response.Write offsetMin & "offset <br>"
response.Write od & " currentdateandtime<br>"
response.Write newdatetime & "adding OffsetMin<br>"
response.Write ISTtime & "adding 330 to above<br>"On AZURE Cloud registry value will give error
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\TimeZoneInformation\ActiveTimeBias
