Function getWeekday

codebase/sources/dhtmlxscheduler.js:15825–15827

(date)

    return month === 1 && isLeapYear(date.getUTCFullYear()) ? 29 : MONTH_DAYS[month];
  };
  var getWeekday = function(date) {
    return PY_WEEKDAYS[date.getUTCDay()];
  };
  var monthRange = function(year, month) {
    var date = datetime(year, month + 1, 1);
    return [getWeekday(date), getMonthDays(date)];