Compares two DateTime values with Poweshell based on diferent cultures

DateCompare.ps1

<#
 .Synopsis
 Datumsvergleich
#>

function Compare-Date
{
    param([Parameter(Mandatory=$true)][String]$Date1,
          [CultureInfo]$CultureDate1 = (Get-Culture),
          [Parameter(Mandatory=$true)][String]$Date2,
          [CultureInfo]$CultureDate2 = (Get-Culture)
          )

    [DateTime]$DateValue1 = &{
        $oldCulture = [System.Threading.Thread]::CurrentThread.CurrentCulture
        [System.Threading.Thread]::CurrentThread.CurrentCulture = $CultureDate1
        # Convert Date 1 using the specific culture
        Get-Date -Date $Date1
        [System.Threading.Thread]::CurrentThread.CurrentCulture = $oldCulture
    }

    [DateTime]$DateValue2 = &{
        $oldCulture = [System.Threading.Thread]::CurrentThread.CurrentCulture
        [System.Threading.Thread]::CurrentThread.CurrentCulture = $CultureDate2
        # Convert Date 1 using the specific culture
        Get-Date -Date $Date2
        [System.Threading.Thread]::CurrentThread.CurrentCulture = $oldCulture
    }

    # Compare Years
    if ($DateValue1.Year -gt $DateValue2.Year) 
    {
        return 1
    }
    elseif ($DateValue1.Year -lt $DateValue2.Year) 
    {
        return -1
    }
    # Compare Months
    if ($DateValue1.Month -gt $DateValue2.Month) 
    {
        return 1
    }
    elseif ($DateValue1.Month -lt $DateValue2.Month) 
    {
        return -1
    }
    # Compare Days
    if ($DateValue1.Day -gt $DateValue2.Day) 
    {
        return 1
    }
    elseif ($DateValue1.Day-lt $DateValue2.Day) 

    {
        return -1
    }
    return 0
     

}