[Kazun]

Код:

$m = [datetime]::ParseExact($T,"MMMM",[Globalization.CultureInfo]::InvariantCulture).Month
$File = $File.Replace($T,$m)

Или создать hashtable^

Код:

$Times = @{
"January" = 1
"February" = 2
}
foreach ($T in $Times.GetEnumerator()) {
	$File = $File.Replace($T.Name,$T.Value)
}