Powershell - Adding a Month to all files in a folder - powershell

Question

a complete newbie to Powershell here.
What I am attempting to do is using Powershell, adding a month for the creationtime of files in a folder, which is based off the current creation date of the document, as opposed to the get-date system date.
Edit to how I get it to work for single documents:
I managed to get it to work for a specific file using this command:
$(get-item test.txt).creationtime=$(Get-item test.txt).creationtime.AddMonths(1)
Rather than specify each filer individually, I want to do the same as above but for all documents in a folder.

Answer 1

If the question is to add 1 month to the LastWriteTime date of each file, instead of setting the LastWriteTime date to a date 1 month away from the current system date, you can do
foreach ($file in (Get-ChildItem -Path 'PathToWhereTheFilesAre' -File)) {
$file.LastWriteTime = $file.LastWriteTime.AddMonths(1)
}
If it is the current system date plus 1 month you want, you can use any of the answers given already by both Klausen and Venkataraman R

Answer 2

You can go for foreach loop to iterate over files and update the lastwritetime
$FolderName = "c:\dev"
foreach($file in (GEt-childitem -Path $FolderName ))
{
$file.lastwritetime=$(Get-Date).AddMonths(1)
}

Answer 3

First you need to define which files you want to apply this "addmonths". In the code sample I added two parameters you may want to remove, just in case you need them.
Thanks.
# Folder where your files are located
$folder = 'C:\Temp\'
# Create list of files to go thru.
# -Recurse option will navigate in the folders recursively.
# -File can be used so no folders are picked up in your script
$files = Get-ChildItem -Path $folder -Recurse -File
# Iterate file by file in the results
foreach($file in $files)
{
$file.lastwritetime=$(Get-Date).AddMonths(1)
}

Answer 4

Thanks all for your help!
I've used your guidance and created the following code which does exactly what I want it to do:
$folder = "C:\Users\ajames\Powershell"
$files = Get-ChildItem -Path $folder -Recurse -File
foreach($file in $files)
{$file.creationtime=$($file.CreationTime.AddDays(1)) }
Cheers again.