Many people choose to use their MM on the earliest opportunity in their trip. That way they will be the freshest. For you, that would be the Tuesday of your visit. However, as the pp stated, earlier hours can trump this strategy. So, if the Tuesday of your trip has the earliest MM hours, win win. But if the Thursday or the Saturday of your trip has earlier MM hours than the Tuesday, you might choose to do one of those days instead, depending on how tired you are by that time. The goal is to make the most effective use of your time during your MM: earlier time=better (because more people choose to sleep in, thus lowering the crowd level during that hour), earlier in your trip=better (because you'll be fresher and have more energy to get more done in that early hour). Does this make sense?