CTimeManUser::getDayStartOffset

public function getDayStartOffset($entry, $bTs = false)
{
	$ts_start = $bTs ? $entry['DATE_START'] : (MakeTimeStamp($entry['DATE_START']) - CTimeZone::GetOffset());
	$ts_start_day = MakeTimeStamp(ConvertTimeStamp($ts_start, 'SHORT'));

	$time_start = $ts_start - $ts_start_day;

	return $entry['TIME_START'] - $time_start;
}