strUTCTime = "20090416143849.156000+480"
Set objSWbemDateTime = CreateObject("WbemScripting.SWbemDateTime")
objSWbemDateTime.Value = strUTCTime
dtmLocalTime = objSWbemDateTime.GetVarDate(true) '参数为true可以自动转换为本地时区
wsh.echo dtmLocalTime
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'cscript /nologo test.vbs
'获取上次关机的日期和时间
'我知道读取系统事件日志的方法可能显得简单些，此处不再赘述，纯粹为了学习更多知识。
strValueName = "HKLM\SYSTEM\CurrentControlSet\Control\Windows\ShutdownTime"
Set objShell = CreateObject("WScript.Shell")
intArray = objShell.RegRead(strValueName)
intTerm = intArray(7)*(2^56) + intArray(6)*(2^48) + intArray(5)*(2^40) + intArray(4)*(2^32) + intArray(3)*(2^24) + intArray(2)*(2^16) + intArray(1)*(2^8) + intArray(0)
intDays = intTerm/(1E7*86400)
dtmShutdownUTC = CDate(DateSerial(1601, 1, 1) + intDays)
'WScript.Echo dtmShutdownUTC

Set objSWbemDateTime = CreateObject("WbemScripting.SWbemDateTime")
objSWbemDateTime.SetVarDate(dtmShutdownUTC)
dtmShutdownGMT = objSWbemDateTime.GetVarDate(false)
'WScript.Echo dtmShutdownGMT

intBias = DateDiff("h", dtmShutdownGMT, dtmShutdownUTC)
'WScript.Echo intBias

dtmShutdownLocal = DateAdd("h", intBias, dtmShutdownUTC)
WScript.Echo dtmShutdownLocal
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'本地时间转换为UTC
Set SWDT = CreateObject("WbemScripting.SWbemDateTime")
SWDT.SetVarDate Now, True
Wscript.Echo SWDT
 
'UTC转换为本地时间
aNow = SWDT.GetVarDate(True)
Wscript.Echo aNow
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strValueName = "HKLM\SYSTEM\CurrentControlSet\Control\Windows\ShutdownTime"
Set objShell = CreateObject("WScript.Shell")
intArray = objShell.RegRead(strValueName)
intTerm = intArray(7)*(2^56) + intArray(6)*(2^48) + intArray(5)*(2^40) + intArray(4)*(2^32) + intArray(3)*(2^24) + intArray(2)*(2^16) + intArray(1)*(2^8) + intArray(0)
intDays = intTerm/(1E7*86400)
dtmShutdownUTC = CDate(DateSerial(1601, 1, 1) + intDays)
'WScript.Echo dtmShutdownUTC

Set SWDT = CreateObject("WbemScripting.SWbemDateTime")
SWDT.SetVarDate dtmShutdownUTC, True
SWDT.Value = Left(SWDT,21)&"+000"
dtmShutdownLocal = SWDT.GetVarDate(True)
Wscript.Echo dtmShutdownLocal
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'参考：
'http://www.windowsitpro.com/article/windows-2000/where-do-windows-2000-and-windows-nt-store-time-zone-information-.aspx
'http://www.realsoftware.com/listarchives/realbasic-nug/2004-12/msg01260.html
Option Explicit

Function GetNetTime(ByVal Url)
    Dim Bias	'时间偏移（分钟）
    Dim objHttp,objReg
    Dim DateLine,tmpDate
    Dim GTime,LocalTime
    
    'On Error Resume Next
    Set objReg=CreateObject("WScript.Shell")
    '[ActiveTimeBias]:该键值存储当前系统时间相对格林尼治标准时间的偏移（以分钟为单位）
    '[Bias]:该键值存储当前本地时间相对格林尼治标准时间的偏移（以分钟为单位）
    Bias=objReg.RegRead("HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation\ActiveTimeBias")
    Set objReg=Nothing
    
	Set objHttp=CreateObject("MSXML2.XMLHTTP")
    'Set objHttp=CreateObject("Microsoft.XMLHTTP")
    With objHttp
    	.open "HEAD",Url,False
    	.send
    	DateLine=.getResponseHeader("Date")
    End With
    Set objHttp = Nothing
   	DateLine=Left(DateLine,InStr(1,DateLine,"GMT",vbTextCompare)-2)
   	'MsgBox DateLine
    tmpDate=Split(DateLine,",")
    GTime=tmpDate(1)
    LocalTime=DateAdd("n",-CLng(Bias),GTime)	'北京时间：GMT+8
    GetNetTime=LocalTime
End Function
MsgBox GetNetTime("http://www.microsoft.com")
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