This can go up to about the year 1.79e308^^1.79e308 but this doesn't really matter the very close at a very big scale so you could say this clock can go up to year 10^^1.79e308
hyperclock also known as the clock that cant overflow you can wait for All neutronium Stars to die but the clock won't even overflow by that time even if you wait to the heat death of the universe assuming after a neutronium star dies it becomes a black hole we don't know if that's true sadly it could become a Beyond hole hyperclock will be the last clock to overflow unless somebody makes a clock that can handle a Time bigger then hyperclock this is also known as the Giga atomic clock