CTimeManUser::openDay

public function openDay($timestamp = false, $report = '', $extraInformation = [])
{
	global $APPLICATION;

	$recordForm = $this->buildStartForm($timestamp, $report, $extraInformation);

	if ($recordForm->validate())
	{
		$result = (new ManageStartHandler())->handle($recordForm);

		if ($result->isSuccess())
		{
			CUser::setLastActivityDate($this->USER_ID);
			$APPLICATION->resetException();
			$this->deleteLastPauseInfo($this->USER_ID);
			static::clearFullReportCache();

			$data = WorktimeRecordTable::convertFieldsCompatible($result->getWorktimeRecord()->collectValues());

			$e = GetModuleEvents('timeman', 'OnAfterTMDayStart');
			while ($a = $e->Fetch())
			{
				ExecuteModuleEventEx($a, [$data]);
			}

			return $data;
		}
		if ($result->getErrors()[0]->getCode() === WorktimeServiceResult::ERROR_FOR_USER)
		{
			$APPLICATION->ThrowException($result->getErrors()[0]->getMessage(), 'ALERT_WARNING');
		}
		else
		{
			$APPLICATION->ThrowException($result->getErrorMessages()[0]);
		}
		return false;
	}
	$APPLICATION->ThrowException($recordForm->getFirstError()->getMessage());
	return false;
}