code: function(jd) {
          var date = gregorianCalendar.fromJD(jd);
          var year = this._g2tYear(date.year());
          return this.newDate(year, date.month(), date.day());
      }
docs: Create a new date from a Julian date.
  @memberof ThaiCalendar
  @param jd {number} The Julian date to convert.
  @return {CDate} The equivalent date.