Abstract: The dating problem of time and duration from literature, physics, geosciences to geochronology was discussed. Although the isotopic geochronological method, after nearly a century of development, is now a mature approach to the time point measurement of a geological event, it is incapable of measuring its duration. A structural geochronology approach was thus proposed recently which could be used to measure the event duration directly. These two methods are complementary to each other.