Is there a function to convert an integer to month string?

I need to convert a month integer into the month name in a binding that is setting a variable. Does anyone have a suggestion about how to convert $sys.item.getProperty(“rx:month”) which is an integer value 1-12 into the month name in the binding?

if ($sys.item.hasProperty(“rx:year”) && $sys.item.hasProperty(“rx:month”)) {$newsletterdate =
$sys.item.getProperty(“rx:month”).String + " " + $sys.item.getProperty(“rx:year”).String ;} else if
($sys.item.hasProperty(“rx:newsletterdate”)) {$newsletterdate = $sys.item.getProperty(“rx:newsletterdate”).String;} else
{$newsletterdate = “”;}