src/sap.ui.core/src/sap/ui/core/date/Persian.js
function toGregorian(oPersian) {
		var iJulianDayNumber = j2d(oPersian.year, oPersian.month + 1, oPersian.day);
		return d2g(iJulianDayNumber);
	}
function toGregorian(oPersian) {
		var iJulianDayNumber = j2d(oPersian.year, oPersian.month + 1, oPersian.day);
		return d2g(iJulianDayNumber);
	}
function toGregorian ( oPersian ) { var iJulianDayNumber = j2d ( oPersian . year , oPersian . month + 1 , oPersian . day ) ; return d2g ( iJulianDayNumber ) ; }
Calculate gregorian date from Persian

@param {object} oPersian a JS object containing day, month and year in the Persian calendar
@private
Calculate gregorian date from Persian