DateLib::getCalendarWorkTime

private function getCalendarWorkTime()
{
	if (static::$startWorkDay === null)
	{
		$startSeconds = 0;
		$endSeconds = 24 * 3600 - 1;

		$calendarSettings = CCalendar::GetSettings();
		if (!empty($calendarSettings['work_time_start']))
		{
			$time = explode('.', $calendarSettings['work_time_start']);
			$startSeconds = $time[0] * 3600;
			if (!empty($time[1]))
			{
				$startSeconds += $time[1] * 60;
			}
		}

		if (!empty($calendarSettings['work_time_end']))
		{
			$time = explode('.', $calendarSettings['work_time_end']);
			$endSeconds = $time[0] * 3600;
			if (!empty($time[1]))
			{
				$endSeconds += $time[1] * 60;
			}
		}
		static::$startWorkDay = $startSeconds;
		static::$endWorkDay = $endSeconds;
	}
	return [static::$startWorkDay, static::$endWorkDay];
}