CECEvent::AddReminder

static function AddReminder($arParams)
{
	$fullUrl = $arParams['fullUrl'];
	$ownerType = $arParams['ownerType'];
	$ownerId = $arParams['ownerId'];
	$userId = $arParams['userId'];

	$url = $fullUrl.(mb_strpos($fullUrl, '?') === FALSE ? '?' : '&').'EVENT_ID='.$arParams["id"];
	$remAgentParams = array('iblockId' => $arParams['iblockId'], 'eventId' => $arParams["id"], 'userId' => $userId, 'pathToPage' => $url, 'ownerType' => $ownerType, 'ownerId' => $ownerId ? $ownerId : 'false');
	if($arParams["remind"] !== false)
	{
		$rem_ts = MakeTimeStamp($arParams['dateFrom'], getTSFormat());
		$delta = intval($arParams["remind"]['count']) * 60; //Minute
		if ($arParams["remind"]['type'] == 'hour')
			$delta = $delta * 60; //Hour
		elseif ($arParams["remind"]['type'] == 'day')
			$delta =  $delta * 60 * 24; //Day
		$rem_ts -= $delta;
		$remindTime = date(getDateFormat(), $rem_ts);

		if ($rem_ts >= (time() - 60 * 5)) // Inaccuracy - 5 min
			CEventCalendar::AddAgent($remindTime, $remAgentParams);
		else
			CEventCalendar::RemoveAgent($remAgentParams);
	}
	else if(!$arParams['bNew'])
	{
		CEventCalendar::RemoveAgent($remAgentParams);
	}
}