Hi..am facing a problem with Date formatting.

In the below code, 

Am inserting dates into the list in the format Date.newInstance(2011, 01, 01), but while iterating list and retrieving the date, it comes out in a different format.

So my further calculations are failing. Could anybody please advice on the same.

When I run the code I get "Internal Salesforce Error".

Problem is because the dates I am comparing are in different formats:

l_dtClosedDate is assigned value: Fri Jan 01 00:00:00 GMT 2010
l_dtMaxCompletedDate is assigned value: 1970-01-01 00:00:00

I want l_dtClosedDate  also in the same format as l_dtMaxCompletedDate.
Actually that is the format in which it is created when I do Date.newInstance(2011, 01, 01) and insert it into the list.

I am not able to do any conversion with the l_dtClosedDate variable fetched from the List. All functions fail when used with that variable.

1. Can anybody advise as to how to convert the l_dtClosedDate variable to this format - 1970-01-01 00:00:00
2. Or how to convert a date in this format - 1970-01-01 00:00:00 to Sat Jan 01 00:00:00 GMT 2011.

public class Maxx
{
	public static void getMaxDate()
	{
		List<Date> l_ltClosedDateList = new List<Date>();
		Date l_dtMaxCompletedDate = Date.newInstance(1970, 1, 1);
		Date l_dtClosedDate;
		String Date1;
		
		//Data
		l_ltClosedDateList.add(Date.newInstance(2010, 1, 1));
		l_ltClosedDateList.add(Date.newInstance(2010, 1, 11));
		l_ltClosedDateList.add(Date.newInstance(2010, 1, 12));
		
		Iterator<Date> l_itClosedDateIter = l_ltClosedDateList.iterator();
		while(l_itClosedDateIter.hasNext())
		{
			System.debug('Entered while loop');
			l_dtClosedDate = l_itClosedDateIter.next();
			
			System.debug('Closed date is assigned value: '+l_dtClosedDate);			
			System.debug('Max completed date is assigned value: '+l_dtMaxCompletedDate);

			if( l_dtClosedDate > l_dtMaxCompletedDate )
			{
				System.debug('Entered if loop');
				l_dtMaxCompletedDate = l_dtClosedDate;
			}
		}
		System.debug('Max Completed Date: '+l_dtMaxCompletedDate);
	}
}