If you wish to set a files 'date modified' timestamp to the current date and time, you can use native commands.
To modify the 'date modified' timestamp of H:\Folder\FileName.ext:
pushd H:\Folder
copy /b /y "FileName.ext" +,,
popd
NOTE: The archive bit is NOT set.
If you wish more control, use
Touch.exe:
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Description: Touch displays or sets the created, access, and modified times of one or more files.
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Touch for Win32, Version 1.0
Freeware by Steve P. Miller (stevemil@pobox.com). Copyright 1997.
Visit http://pobox.com/~stevemil for the latest version and other utilities.
Usage: touch [/s] [/h] [/p] [/q] [/v] [/c] [/m] [/a] [/r file]
[/d mm-dd\[-[cc]yy]] [/t hh\[:mm\[:ss\[.ms]]]] filespec ...
/s Process subdirectories.
/h Process hidden/system files/directories.
/p Prompt for each file (Yes/No/All/Quit). Ignored in view mode.
/q Quiet mode; Only display errors; Ignored in view mode.
/v View mode; Display times rather than set times.
/c View/set created time.
/m View/set modified time; Default if /a and /c are not specified.
/a View/set accessed time.
/r Reference file; Use this file's date and time to set other files.
/d Date: month, day, century, year.
/t Time: hour (0-24), minutes, seconds, milliseconds.
In view mode (/v), the /p, /q, /r, /d, and /t options are ignored.
In set mode, the default is to use the current date and time.
Use the /r, /d, and/or /t options to override the default set time.
The century (cc) is assumed to be 19 for years 69-99, and 20 for years 00-68.