if (null == _allowedDatesArray_startsWithLetter) 
		{
			_allowedDatesArray_startsWithLetter = new String[] {
					DateFormatUtils.SMTP_DATETIME_FORMAT.getPattern(),
					
					"MMM d, yyyy hh:mm a",
					"MMM d, yyyy HH:mm",
					"MMM d, yyyy hh:mm:ss a",
					"MMM d, yyyy HH:mm:ss",
					"MMM d, yyyy hh:mm:ss.SS a",
					"MMM d, yyyy HH:mm:ss.SS",
					
					"EEE MMM dd HH:mm:ss zzz yyyy",
					"EEE MMM dd yyyy HH:mm:ss zzz",
					"EEE MMM dd yyyy HH:mm:ss 'GMT'Z (zzz)",					
			};					
			_allowedDatesArray_numeric_1 = new String[] {
					"yyyy-MM-dd'T'HH:mm:ss'Z'",
					DateFormatUtils.ISO_DATE_FORMAT.getPattern(),
					DateFormatUtils.ISO_DATE_TIME_ZONE_FORMAT.getPattern(),
					DateFormatUtils.ISO_DATETIME_FORMAT.getPattern(),
					DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT.getPattern()
			};
			_allowedDatesArray_numeric_2 = new String[] {					
					"yyyyMMdd",
					"yyyyMMdd hh:mm a",
					"yyyyMMdd HH:mm",
					"yyyyMMdd hh:mm:ss a",
					"yyyyMMdd HH:mm:ss",
					"yyyyMMdd hh:mm:ss.SS a",
					"yyyyMMdd HH:mm:ss.SS",
					// Julian, these are unlikely
					"yyyyDDD",
					"yyyyDDD hh:mm a",
					"yyyyDDD HH:mm",
					"yyyyDDD hh:mm:ss a",
					"yyyyDDD HH:mm:ss",
					"yyyyDDD hh:mm:ss.SS a",
					"yyyyDDD HH:mm:ss.SS",
				};
			_allowedDatesArray_stringMonth = new String[] {
					"dd MMM yy",
					"dd MMM yy hh:mm a",
					"dd MMM yy HH:mm",
					"dd MMM yy hh:mm:ss a",
					"dd MMM yy HH:mm:ss",
					"dd MMM yy hh:mm:ss.SS a",
					"dd MMM yy HH:mm:ss.SS",
				};
			_allowedDatesArray_numericMonth = new String[] {
					"MM dd yy",
					"MM dd yy hh:mm a",
					"MM dd yy HH:mm",
					"MM dd yy hh:mm:ss a",
					"MM dd yy HH:mm:ss",
					"MM dd yy hh:mm:ss.SS a",
					"MM dd yy HH:mm:ss.SS",
			};
		}

// substitue YOUR.DATE.FIELD, and the date format
function createPubDate(metadata) {
    var date = metadata.YOUR.DATE.FIELD;
    var parsedDate = new java.text.SimpleDateFormat('MM/dd/yyyy hh:mm:ss a (zzz)').parse(date);
    return '' + parsedDate.toString();
}

{
	"docMetadata": {
		//...	
		publishedDate: "$SCRIPT( createPubDate(_doc.metadata) );
		//...
	}
}