Help with Powershell - moving files to folders based on date

Question

I have spent about a week on this task, and I know I am nowhere near an expert on Powershell, I am running into a wall.
Here is what I want to accomplish - I have a folder with 1000's of files going back three years. I want to write a PS script that will move all the files older than three months into archive folders based on the file creation date. I need two levels, Year
and inside the year, month.
Here is what I have so far
$location = "C:\scripts\Test1"
cd $location
dir | ?{$_.psiscontainer -eq $false}| %{$a="$($_.creationtime.year.ToString())";mkdir -ea 0 $a;mv $_ $a}
$locationYear = "C:\Scripts\Test1\$a"
cd $locationYear
dir | ?{$_.psiscontainer -eq $false}| %{$b="$($_.creationtime.month.ToString())";mkdir -ea 0 $b;mv $_ $b}
I know its basic, but it is working so far, except the folder month is in numeral format, 3 not 03. This is a requirement from our development team.
Any help would be appreciated, Thanks! 

Answer 1

JVR- thank you as well, I keep getting strange results. It looks like it makes the folders for 2014 but then starts erroring - it should be looking in the scripts/pdf folder, not the scripts folder.
Move-Item : Cannot find path 'C:\scripts\2014-05-23 - XXXXX - report.pdf' because it does not exist.
At C:\scripts\scriptomovetocreationdatefolderNEW.ps1:6 char:3
+         Move-Item $_ $newdir
+         ~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (C:\scripts\2014...62 - report.pdf:String) [Move-Item], ItemNotFoundException
    + FullyQualifiedErrorId : PathNotFound,Microsoft.PowerShell.Commands.MoveItemCommand
$location = "C:\scripts\pdfs"
dir $location -File | 
ForEach-Object{
$Fldr='{0}\{1}\{2:D2}' -f $location, $_.CreationTime.Year,$_.CreationTime.Month
$newdir=$dir=New-Item $fldr -ItemType Directory -force
Move-Item $_ $newdir