4 ms·31*12=372 So we would have had a nice regular calendar back then.by forinti 7y ago31*12=372 So we would have had a nice regular calendar back then.Rhinobird 7y ago28*13(+1)=365 (or +2 on leap years)hoseja 7y ago1 second = 9192631770 unperturbed ground-state hyperfine transitions of cesium-133 atom (preferably outside of solar system gravitation well) Calendars are silly. "Neat" ones even more so._jal 7y agoNah, humans are just missing about a twelfth of a finger.admax88q 7y agoBrb, just going to check my pocket cesium-133 so I can calculate how many days till my dentist appointment.