function localizeCalendar(cal)
{
    /*
    cal.cfg.setProperty("DATE_FIELD_DELIMITER", "-");

	cal.cfg.setProperty("MDY_DAY_POSITION", 3);
	cal.cfg.setProperty("MDY_MONTH_POSITION", 2);
	cal.cfg.setProperty("MDY_YEAR_POSITION", 1);

	cal.cfg.setProperty("MD_DAY_POSITION", 1);
	cal.cfg.setProperty("MD_MONTH_POSITION", 2);
	*/

	cal.cfg.setProperty("START_WEEKDAY", 1);
	// Date labels

	cal.cfg.setProperty("MONTHS_SHORT",   ["sty","lut","mar","kwi","maj","cze","lip","sie","wrz","paź","lis","gru"]);
	cal.cfg.setProperty("MONTHS_LONG",    ["styczeń","luty","marzec","kwiecień","maj","czerwiec","lipiec","sierpień","wrzesień","październik","listopad","grudzień"]);
	cal.cfg.setProperty("WEEKDAYS_1CHAR", ["N","P","W","Ś","C","P","S"]);
	cal.cfg.setProperty("WEEKDAYS_SHORT", ["N","Pn","Wt","Śr","Cz","Pt","So"]);
	cal.cfg.setProperty("WEEKDAYS_MEDIUM",["N","Pn","Wt","Śr","Cz","Pt","So"]);
	cal.cfg.setProperty("WEEKDAYS_LONG",  ["niedziela","poniedziałek","wtorek","środa","czwartek","piątek","sobota"]);
}