jquery-src/jquery.calendars.mayan.js
function(jd) {
			jd -= this.jdEpoch;
			var day = mod(jd + 8 + ((18 - 1) * 20), 365);
			return [Math.floor(day / 20) + 1, mod(day, 20)];
		}
function(jd) {
			jd -= this.jdEpoch;
			var day = mod(jd + 8 + ((18 - 1) * 20), 365);
			return [Math.floor(day / 20) + 1, mod(day, 20)];
		}
function ( jd ) { jd -= this . jdEpoch ; var day = mod ( jd + 8 + ( ( 18 - 1 ) * 20 ) , 365 ) ; return [ Math . floor ( day / 20 ) + 1 , mod ( day , 20 ) ] ; }
Retrieve Haab date from a Julian date.
@memberof MayanCalendar
@private
@param jd  {number} The Julian date.
@return {number[]} Corresponding Haab month and day.
Retrieve Haab date from a Julian date .