The event will occur on 2016/04/06, at around 08:30 UTC. Exact time depends on your location on Earth - after all, the object that occults is much closer to us than to the target of occultation. Expect several minutes of difference.
Venus will slide behind the Moon in less than 30 seconds, then stay behind it for more than an hour, and then slide out.
The event will be visible some 17° away from the solar disk, so be careful. Stay in a shade behind a building or something to remove the glare. The event can be seen with a naked eye because Venus is always visible like that, but it would be much easier if you used a telescope or at least binoculars.
Check it in Stellarium or any similar software for exact local time of the event.