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Enabling DST (the summertime and wintertime schedules across the globe) within your time zone might cause an unexpected shift in datetimes by 1 hour when you're trying to set filetimes with FileSetTime or read them with FileGetTime. This behaviour frequently causes bugreports like #3139 at https://www.autoitscript.com/trac/autoit/ticket/3139 'FileGetTime out by exactly one hour.', where it was classified as 'No bug'. Now this isn't considered a bug when you're referring to the datetime as shown by the command prompt (DOS prompt, even in Windows 7+) or Windows Explorer XP, as these programs use 'old style' DST behaviour. But it definitely can be considered a bug when you're using Windows Explorer 7+, which adopts the 'new style' behaviour. 'Old style' (currently implemented, v3.3.14.2 and previous) calculates datetimes as follows: FileSetTime = local time - time zone - DST currently in effect FileGetTime = file datetime + time zone + DST currently in effect whereas 'new style' calculation of datetimes would require: FileSetTime = local time - time zone - DST in effect at the time of the file's datetime (Dynamic Time Zones) FileGetTime = file datetime + time zone + DST in effect at the time of the file's datetime (Dynamic Time Zones) This 'new style' behaviour will leave your timestamps unaltered in Windows Explorer 7+ whenever a transition to summertime or wintertime occurs, but requires detailed records of all DST schedules worldwide. Fortunately all these records are readily available in Windows 7+! You can read more about this in Raymond Chen insider blogs at https://blogs.msdn.microsoft.com/oldnewthing/20130308-00/?p=5023 and https://technet.microsoft.com/en-us/magazine/ff394358.aspx To have FileSetFile and FileGetFile adopt the 'new style' DST behaviour, I've written FileSetFileExt and FileGetFileExt. As part of FileSetFileExt, which has an option to recurse into the given path, the function FindFiles was created. It's included separately and you can easily apply it as a stand-alone function to recurse a given path and process all files that match a specified pattern. I think it's a useful function that AutoIt unfortunately still lacks. FileSetTimeExt (FileSetTime voor DST en Win7+): #AutoIt3Wrapper_Au3Check_Parameters=-d -w 1 -w 2 -w 3 -w- 4 -w 5 -w 6 -w- 7 #include <File.au3> #include <Date.au3> #include <WinAPIFiles.au3> #include <WinAPI.au3> ConsoleWrite("Set Modified datetime of this script to Jan 12th 2016 at 15:16:17" & @CRLF) FileSetTimeExt(@ScriptFullPath, "20160123151617", 0, 0) Func FileSetTimeExt($filename, $time, $type = 0, $recurse = 0) ; v1.0 ; Extended FileSetTime function to properly deal with DST (Daylight Saving Time (summertime/wintertime)) on Windows 7+ ; Usage is identical to the FileSetTime function with full wildcard support, including multiple * and ? usage. ; ; AutoIt Version: 3.3.14.2 ; This function requires Windows 7 or later. ; ; Requirements to include in your main program: ; #include <File.au3> ; #include <Date.au3> ; #include <WinAPIFiles.au3> ; #include <WinAPI.au3> If $type = Default Then $type = 0 If $recurse = Default Then $recurse = 0 If $time = "" Then $time = StringRegExpReplace(_NowCalc(), "[^0-9]", "") Local $sDrive = "", $sDir = "", $sFileName = "", $sExtension = "", $ssDir = "", $sDummy1 = "", $sDummy2 = "" _PathSplit($filename, $sDrive, $sDir, $sFileName, $sExtension) ; extend path to full path if filename has no path or a path relative to ScriptDir If $sDrive = "" Then _PathSplit(@ScriptFullPath, $sDrive, $ssDir, $sDummy1, $sDummy2) $sDir = $ssDir & $sDir $filename = _PathMake($sDrive, $sDir, $sFileName, $sExtension) EndIf ; FileSetTime makes no difference between * and *.*, whereas_WinAPI_IsNameInExpression does, so make adjustments If $sExtension = ".*" Then $sFileName = $sFileName & "*" $sExtension = "" EndIf Local $hSearch $hSearch = FileFindFirstFile(_PathMake($sDrive, $sDir, "*", ".*")) ; searches for every file and directory If $hSearch = -1 Then Return 1 Local $pattern, $eExt, $tSystem, $tFile, $hFile, $pFileName ; get correct local time $tSystem = _Date_Time_EncodeSystemTime(StringMid($time, 5, 2), StringMid($time, 7, 2), StringLeft($time, 4), _ StringMid($time, 9, 2), StringMid($time, 11, 2), StringMid($time, 13, 2)) $tSystem = _Date_Time_TzSpecificLocalTimeToSystemTime($tSystem) $tFile = _Date_Time_SystemTimeToFileTime($tSystem) $pattern = StringMid(_PathMake("", "", $sFileName, $sExtension), 2) ; StringMid skips leading \ While 1 $sFileName = FileFindNextFile($hSearch) If @error = 1 Then ; no more files or directories match the pattern ExitLoop Else $eExt = @extended $pFileName = _PathMake($sDrive, $sDir, $sFileName, "") ; _WinAPI_IsNameInExpression supports full wildcard matching, including multiple * and ? usage. If _WinAPI_IsNameInExpression($sFileName, $pattern) Then ; set correct local time for matching file or directory ; try the usual function first to catch errors beforehand If FileSetTime($pFileName, $time, $type) = 0 Then FileClose($hSearch) Return 0 ; abort on error EndIf ; use _WinAPI_CreateFileEx instead of _WinAPI_CreateFile to include directory renaming without an 'Access is denied' error $hFile = _WinAPI_CreateFileEx($pFileName, $OPEN_EXISTING, $GENERIC_WRITE, $FILE_SHARE_WRITE, $FILE_FLAG_BACKUP_SEMANTICS) Switch $type Case 0 _Date_Time_SetFileTime($hFile, 0, 0, $tFile) ; set time Last modified (= Last written) (default) Case 1 _Date_Time_SetFileTime($hFile, $tFile, 0, 0) ; set time Created Case 2 _Date_Time_SetFileTime($hFile, 0, $tFile, 0) ; set time Last accessed EndSwitch _WinAPI_CloseHandle($hFile) EndIf ; perform a full recursive search if need be If $eExt = 1 And $recurse = 1 Then If FileSetTimeExt($pFileName & '\' & $pattern, $time, $type, $recurse) = 0 Then FileClose($hSearch) Return 0 ; abort on error EndIf EndIf EndIf WEnd FileClose($hSearch) Return 1 ; no error occurred EndFunc ;==>FileSetTimeExt FileGetTimeExt (FileGetTime voor DST en Win7+): #AutoIt3Wrapper_Au3Check_Parameters=-d -w 1 -w 2 -w 3 -w- 4 -w 5 -w 6 -w- 7 #include <File.au3> #include <Date.au3> #include <WinAPIFiles.au3> #include <WinAPI.au3> ConsoleWrite("Modified datetime of this script is " & FileGetTimeExt(@ScriptFullPath, 0, 1) & @CRLF) ConsoleWrite("Created datetime of this script is " & FileGetTimeExt(@ScriptFullPath, 1, 1) & @CRLF) ConsoleWrite("Last accessed datetime of this script is " & FileGetTimeExt(@ScriptFullPath, 2, 1) & @CRLF) Func FileGetTimeExt($filename, $option = 0, $format = 0) ; v1.0 ; Extended FileGetTime function to properly deal with DST (Daylight Saving Time (summertime/wintertime)) on Windows 7+ ; Usage is identical to the FileGetTime. ; ; AutoIt Version: 3.3.14.2 ; This function requires Windows 7 or later. ; ; Requirements to include in your main program: ; #include <File.au3> ; #include <Date.au3> ; #include <WinAPIFiles.au3> ; #include <WinAPI.au3> If $option = Default Then $option = 0 If $format = Default Then $format = 0 Local $sDrive = "", $sDir = "", $sFileName = "", $sExtension = "", $ssDir = "", $sDummy1 = "", $sDummy2 = "" _PathSplit($filename, $sDrive, $sDir, $sFileName, $sExtension) ; extend path to full path if filename has no path or a path relative to ScriptDir If $sDrive = "" Then _PathSplit(@ScriptFullPath, $sDrive, $ssDir, $sDummy1, $sDummy2) $sDir = $ssDir & $sDir $filename = _PathMake($sDrive, $sDir, $sFileName, $sExtension) EndIf Local $aTime, $tDate, $tOut[6], $hFile, $tSystem, $tLocal, $tFile FileGetTime($filename, $option, $format) ; test if no error occurs If @error Then Return SetError(@error, 0, "") ; use _WinAPI_CreateFileEx instead of _WinAPI_CreateFile to include directory access without an 'Access is denied' error $hFile = _WinAPI_CreateFileEx($filename, $OPEN_EXISTING, $GENERIC_READ, $FILE_SHARE_READ, $FILE_FLAG_BACKUP_SEMANTICS) Switch $option ; convert FileGetTime option 0 to _Date_Time_GetFileTime option 2, 1 to 0 and 2 to 1 Case 0 $option = 2 ; Last modified (default) Case 1 $option = 0 ; Created Case 2 $option = 1 ; Last accessed EndSwitch $aTime = _Date_Time_GetFileTime($hFile) _WinAPI_CloseHandle($hFile) $aTime = $aTime[$option] $tSystem = _Date_Time_FileTimeToSystemTime($aTime) $tLocal = _Date_Time_SystemTimeToTzSpecificLocalTime($tSystem) $tFile = _Date_Time_SystemTimeToFileTime($tLocal) $tDate = _Date_Time_FileTimeToArray($tFile) $tOut[0] = StringFormat("%04i", $tDate[2]) ; Year $tOut[1] = StringFormat("%02i", $tDate[0]) ; Month $tOut[2] = StringFormat("%02i", $tDate[1]) ; Day $tOut[3] = StringFormat("%02i", $tDate[3]) ; Hour $tOut[4] = StringFormat("%02i", $tDate[4]) ; Minutes $tOut[5] = StringFormat("%02i", $tDate[5]) ; Seconds If $format = 0 Then Return SetError(0, 0, $tOut) Return SetError(0, 0, $tOut[0] & $tOut[1] & $tOut[2] & $tOut[3] & $tOut[4] & $tOut[5]) EndFunc ;==>FileGetTimeExt FindFiles (full recursive file search voor Win7+): #AutoIt3Wrapper_Au3Check_Parameters=-d -w 1 -w 2 -w 3 -w- 4 -w 5 -w 6 -w- 7 #include <File.au3> #include <Date.au3> #include <WinAPIShPath.au3> ; Find all files (with or without an extension) in ScriptDir with recursion FindFiles("*", 1, False) Func FindFiles($filename, $recurse = 0, $CaseSensitive = False); ; v1.0 ; Find all files matching $filename with full wildcard support, including multiple * and ? usage. ; Set $recurse to 1 to include searching all subdirectories. ; Set $CaseSensitive to True to include case sensitive searching. ; Filenames without extension demand a $filename without an extension, ; e.g. abc* matches abc.txt and abc, whereas abc*.* matches abc.txt but not abc. ; ; Use Func FoundFileProcessing($filename) to process a single found file. ; FoundFileProcessing($filename) receives filenames with full path. ; ; AutoIt Version: 3.3.14.2 ; This function requires Windows 7 or later. ; ; Requirements to include in your main program: ; #include <File.au3> ; #include <Date.au3> ; #include <WinAPIShPath.au3> If $recurse = Default Then $recurse = 0 If $CaseSensitive = Default Then $CaseSensitive = False Local $sDrive = "", $sDir = "", $sFileName = "", $sExtension = "", $ssDir = "", $sDummy1 = "", $sDummy2 = "" _PathSplit($filename, $sDrive, $sDir, $sFileName, $sExtension) ; extend path to full path if filename has no path or a path relative to ScriptDir If $sDrive = "" Then _PathSplit(@ScriptFullPath, $sDrive, $ssDir, $sDummy1, $sDummy2) $sDir = $ssDir & $sDir $filename = _PathMake($sDrive, $sDir, $sFileName, $sExtension) EndIf Local $hSearch $hSearch = FileFindFirstFile(_PathMake($sDrive, $sDir, "*", ".*")) ; searches for every file and directory If $hSearch = -1 Then Return 1 Local $pattern, $eExt, $pFileName $pattern = StringMid(_PathMake("", "", $sFileName, $sExtension), 2) ; StringMid skips leading \ While 1 $sFileName = FileFindNextFile($hSearch) If @error = 1 Then ; no more files or directories match the pattern ExitLoop Else $eExt = @extended $pFileName = _PathMake($sDrive, $sDir, $sFileName, "") ; _WinAPI_IsNameInExpression supports full wildcard matching, including multiple * and ? usage. If _WinAPI_IsNameInExpression($sFileName, $pattern, $CaseSensitive) Then FoundFileProcessing($pFileName) If $eExt = 1 And $recurse = 1 Then FindFiles($pFileName & '\' & $pattern, $recurse, $CaseSensitive) EndIf WEnd FileClose($hSearch) Return 1 ; no error EndFunc ;==>FindFiles Func FoundFileProcessing($filename) ConsoleWrite('processing ' & $filename & @CRLF) EndFunc ;==>FoundFileProcessing FileSetTimeEx (FileSetTime voor DST en Win7+).au3 FileGetTimeEx (FileGetTime voor DST en Win7+).au3 FindFiles (full recursive file search voor Win7+).au3

Interesting solution. I usually use UI Automation code.

I can help, but only if you can make a service account keys or OAuth 2.0 client IDs here https://console.developers.google.com/apis/credentials