SetFileTimeStamp

SetFileTimeStamp.ps1

<#
    Description: How to edit timestamps with Windows PowerShell

    Single File
    Get-Item C:\temp\test.txt | select Mode, Name, CreationTime, LastAccessTime, LastWriteTime | fl
    $(Get-Item C:\temp\test.txt).creationtime=$(Get-Date)
    $(Get-Item C:\temp\test.txt).lastaccesstime=$(Get-Date "12/24/2011 07:15 am")

    Get-Item C:\temp\test.txt | select Mode, Name, CreationTime, LastAccessTime, LastWriteTime | fl 
#>
$FilePath = "C:\temp"
$TimeStamp = "11/11/2019 12:00:00"

$FileList = Get-ChildItem -Path C:\temp -File -Force 
foreach($File in $FileList) {
    $File.CreationTime=($TimeStamp)
    $File.LastAccessTime=($TimeStamp)
    $File.LastWritetime=($TimeStamp)
}