Convert between calendars

Question

How to convert between calendars? Here is what I have:

UmAlQuraCalendar hijri = new UmAlQuraCalendar();
GregorianCalendar cal = new GregorianCalendar();

DateTime hijriDate = new DateTime(1434, 11, 23, hijri);
DateTime gregorianDate = ...; //

I need a gregorianDate that corresponds to the hijriDate.

Answer 1

It seems that the Date saved in DateTime is always in the current calendar. So if the current calendar is Gregorian hijriDate is already in Gregorian.

var hijriDate = new DateTime(1434, 11, 23, hijri);
//Console writeline will show 2013-09-29 00:00:00

If your current calendar is UmAlQuraCalendar you should be able to extract a Gregorian date using:

var hijri = new UmAlQuraCalendar();
var cal = new GregorianCalendar();

var hijriDate = new DateTime(1434, 11, 23, hijri);
var y = cal.GetYear(hijriDate), 
var m = cal.GetMonth(hijriDate), 
var d = cal.GetDayOfMonth(hijriDate)