How to call a mysql stored procedure, with arguments, from command line?

How can I call a stored procedure from command line?

I have a procedure:

CREATE DEFINER=`root`@`localhost` PROCEDURE `insertEvent`(IN `dateTimeIN` DATETIME)
    NO SQL
BEGIN
    SET @eventIDOut = NULL;

    IF  EXISTS(SELECT * FROM `events` WHERE `eventDate` = dateTimeIN) THEN
        SELECT `eID` INTO @eventIDOut FROM `events` WHERE `eventDate` = dateTimeIN LIMIT 1;
        ELSE
        INSERT INTO `events` (`eventDate`) VALUES(dateTimeIN);
        SET @eventIDOut = last_insert_id();
    END IF;

    SELECT CONCAT(@eventIDOut);
END

1. I tried this: mysql> CALL insertEvent(2012.01.01 12:12:12);

   Result:

   ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.01 12:12:12)' at line 1

2. And this: mysql> CALL insertEvent

   -> 2012.01.01 12:12:12;

   Result:

   ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '2012.01.01 12:12:12' at line 2

With quotes around the date:

mysql> CALL insertEvent('2012.01.01 12:12:12');