Conventionally we divide time into past, present and future. Everything we plan to do is in the future, every thing we have done is in the past, every thing we do, we do in the present. The problem comes when we try to look closely at “that infinitesimal point of time we call the present”. The more closely we look, the more elusive that “present” becomes. We call it infinitesimal, but by that do we mean “infinitely small”, or “so small that we cannot even think about its smallness”. If we mean the former, then we run into problems regarding the actual existence of something that is really of infinite smallness. If we are talking about the latter, then we can be absolutely sure that some one will have tackled the problem of thinking about how small the smallest object could be, or how brief the shortest finite time could be. Max Planck did. He calculated that the shortest period of time that could have any significance was 10^-43 seconds. If time is quantized this is probably the quantum of time, and must be the duration of the present, but we don’t know if time is continuous or quantized. If it is quantized, we reduce time to Planck’s time, or to nothing, but beware, nothing is not always what it seems.