PowerShell - Sort files by date

sort-by-date.ps1

# Move files in selected directory to new folders named with file creation date
# Author: GhostlyR (https://github.com/Ghostlyr)

param (
	[string] $dir,
	[string] $format = "yyyy.MM.dd",
	[string] $exclude = "sort-by-date.ps1"
)

if (!$dir) {
	Write-Host "Wrong directory argument!"
}

if (!([string] $format -as [DateTime])) {
	Write-Host "Wrong datetime format argument!"
}  

Get-ChildItem $dir -exclude $exclude | % {
	$file = $_.FullName 
	$date = Get-Date ($_.CreationTime)
	$new_filename = $date.ToString($format)
	
	New-Item -Type Directory -Force -Path "$dir\$new_filename"
	Move-Item $file "$dir\$new_filename"
}