Calculate FromDate/ToDate based on Daily,Weelkly,Monthly in X++

boolean canRun = false;
TransDate fromDate, toDate, prevDate;
TransDate currentDate = DateTimeUtil::getSystemDate(DateTimeUtil::getUserPreferredTimeZone());
switch (Reporting.Schedule)
{
	case ReportingSchedule::Daily :
		fromDate = currentDate - 1;
		toDate = currentDate - 1;
		canRun = true;
		break;
	case ReportingSchedule::Weekly :
		PreferredLocale preferredLocale = (new xSession()).PreferredLocale();
		prevDate = HcmDateTimeUtil::calculateDateWithOffset(PeriodUnit::Day,7,false, currentDate);
		fromDate = DateTimeUtil::getStartOfWeekDate(preferredLocale, prevDate);
		toDate   = DateTimeUtil::getEndOfWeekDate(preferredLocale, prevDate);
		canRun   = dayOfWk(currentDate) == 1; //1 for monday
		break;
	case ReportingSchedule::Monthly :
		prevDate = prevMth(currentDate);
		fromDate = DateStartMth(prevDate);
		toDate   = endmth(prevDate);
		canRun   = dayOfMth(currentDate) == 1; //1 for first day of the month
		break;
}

Conversion from UTCDateTime to Date or Time in AX

Here is an example of correct conversion between UTCDateTime value and Date and Time value which is associated with user preferred time zone:
public static void testDateTimeConversion()
{
    utcDateTime dateTime;
    date dateInUserTimeZone;
    TimeOfDay timeInUserTimeZone;

    dateTime = DateTimeUtil::utcNow();

    dateInUserTimeZone = DateTimeUtil::date(DateTimeUtil::applyTimeZoneOffset(dateTime, DateTimeUtil::getUserPreferredTimeZone()));
    timeInUserTimeZone = DateTimeUtil::time(DateTimeUtil::applyTimeZoneOffset(dateTime, DateTimeUtil::getUserPreferredTimeZone()));

    dateTime = DateTimeUtil::newDateTime(dateInUserTimeZone, timeInUserTimeZone, DateTimeUtil::getUserPreferredTimeZone());
}