//=== Date
	fromDate = str2date(fromDateStr,321);
	if empty -> date not valid

	Global::dateNull();						//---> Date null : 01/01/1900
	dateMax();								//---> Date max  : 2154

	yesterday = systemdateget() - 1;		//---> Today - 1 days

	mkdate(day,month,year);					//---> To build a new date

	date2num(date2) - date2num(date1) = date2 - date1	//----> difference in days between 2 date	

	dateDay = systemdateget();				//return the system date and don't use UTC and timezone.
	
	dayOfMth(date); 			// day of the date
	MthOfYr(date);				// month of year
	year(date));   				// year of the date
	dateStartMth(date);     	// First day of the month
	dateEndMth(date);     		// Last  day of the month

    prevYr(invDateDate);    	//year before , nextYr : next year.
	dateMthFwd(dateMonth_i,i)   // add i months to the date

	date	dateDay = systemDateGet();
	dateStr=strrem(date2str(systemdateget(), 321, 2, -1, 2, -1, 4),'/');	//strrem : remove of the '/';

	DateSeparator::Hyphen = "-"

static void Job2(Args _args)
{
    date currentDate = today();
    str s;
    int iEnum;
    s = date2Str(currentDate,321,DateDay::Digits2,
				DateSeparator::Hyphen,DateMonth::Digits2,
				DateSeparator::Hyphen,DateYear::Digits4);
    info("Today is:  " + s);
}
/** Example Infolog output
Message (12:36:21 pm)
Today is:  2009-01-13
**/

//=== UtcDateTime
	UtcDateTime	dateTimeInvoice;
	dateDay = systemDateget();
	dateTimeInvoice  = DateTimeUtil::getSystemDateTime();	//DateTime AX     with    TZ if it is 11:00 in Israel -> 09:00)
	dateTimeInvoice  = DateTimeUtil::utcNow();				//(DateTime System with    TZ if it is 11:00 in Israel -> 09:00)
	The explanation is that in tools > Session Date, we see that the Time zone of Israel is GMT + 2. In the data Base of the date 
	are in date Time of GMT.

	Date system : '08/01/2013' 16:00:00
	dateTimeFrom = DateTimeUtil::newDateTime(DateFrom, 0);									//-> '08/01/2013 00:00:00' 
	dateTime = DateTimeUtil::newDateTime(_date,0,DateTimeUtil::getUserPreferredTimeZone()); //-> '08/01/2013 14:00:00'  (date system -2)			
	dateTime = DateTimeUtil::removeTimeZoneOffset(dateTime
			   DateTimeUtil::applyTimeZoneOffset(DateTimeUtil::getSystemDateTime(),
											 DateTimeUtil::getUserPreferredTimeZone());

	DateTimeUtil::maxValue()

	//Date time null :	
	DateApprovedUtc = utcDateTimeNull();   ==> date time null;

//=== Time
	now = timenow();								//---> System Time
	timestr = strrem(time2str(now,1,1),':');
	dateTimeInvoice  = DateTimeUtil::toStr; is better because it not depend of the parameter of the system

	int timeOfDay1,timeOfDay2,timeOfDay3;
	timeOfDay1 = str2time('01:00:01');
	timeOfDay2 = str2time('02:00:01');
	timeOfDay3 = timeOfDay2 - timeOfDay1;			//---> difference in seconds.  

	timeOfDay = str2time('01:00:01'); 				//--->there is not milli-seconds.

	time2str(timeNow(),TimeSeparator::Colon,TimeFormat::Hour24)
    info(strFmt("@SPL4285",time2str(timeNow(),TimeSeparator::Colon,TimeFormat::Hour24)));

notes
-----
http://kashperuk.blogspot.co.il/2010/02/utcdatetime-in-dynamics-ax-2009.html

AX 2012 : timeconsumed : http://dynamicsaxgyan.wordpress.com/2012/01/12/timeconsumeda-very-useful-function-in-global-class-in-ax-2012-x/

//to see
public void new(
	DateEffectivenessMap    _dateEffectivenessMap,
	boolean                 _deleteRecord = false)
{
	;
	current = _dateEffectivenessMap;
	deleteRecord = _deleteRecord;

	dateMin = DateEffectivenessCheck::removeTime(DateTimeUtil::minValue());
	dateMax = DateEffectivenessCheck::removeTime(DateTimeUtil::maxValue());

	this.setBuffer(current);
}