/**
* @param $iDays
* @param string $sDate
* @return bool|string - new date
*/
static function subtractDays($iDays, $sDate = '')
{
if (!$sDate) {
$sDate = date('Y-m-d');
}
$julian = self::dateToJulian($sDate);
$julian -= $iDays;
return Date::julianToDate($julian);
}
static function diff($endDate, $beginDate)
{
$start_date = Util\Date::dateToJulian($beginDate);
$end_date = Util\Date::dateToJulian($endDate);
return $end_date - $start_date;
}