Yearmonthday directory

# Get current Year and Month
$CurrYear = [datetime]::Now.Year
$CurrMonth = [datetime]::Now.Month

# Create new array with numbers from 1 to DaysInMonth
1..([datetime]::DaysInMonth($CurrYear, $CurrMonth)) |
    # For each element in array
    ForEach-Object {
        # Generate name for new directory in ddMMyyyy format
        # To do so, we create new DateTime Object with day from pipeline and current year and month
        # Then we convert it to the abovementioned format
        $DirName = ([datetime]::ParseExact("$_/$CurrMonth/$CurrYear", 'd/M/yyyy', [System.Globalization.CultureInfo]::InvariantCulture)).ToString('ddMMyyyy')

        # Correctly join path with current directory and new folder name
        $Path = Join-Path -Path (Get-Location).Path -ChildPath $DirName

        # Create new directory
        New-Item -ItemType Directory -Path $Path
    }