code: function(year) {
          var date = this._validate(year, this.minMonth, this.minDay, main.local.invalidYear);
          return (date.year() * 11 + 14) % 30 < 11;
      }
docs: Determine whether this date is in a leap year.
  @memberof IslamicCalendar
  @param year {CDate|number} The date to examine or the year to examine.
  @return {boolean} <code>true</code> if this is a leap year, <code>false</code> if not.
  @throws Error if an invalid year or a different calendar used.