Static fire was planned for today. Date for an actual launch hasn't been set yet, because a successful static fire (or several) has to take place before that. SpaceX is taking their time to extensively ground test this one, because the Falcon Heavy has never flown before, and is a significantly more complex rocket than the proven Falcon 9 (27 engines need to ignite at launch vs. 9, plus the booster attachments have never been tested before).