This meant that by the time #JuliusCaesar became dictator, nobody in the empire could agree on what the actual date was, because the Romans SUCKED at timekeeping.
The one good thing they did was begin the #CivilDay at #midnight, so at least the length of the civil day stayed consistent throughout the year.
(Oh, and at some point they moved #NewYearsDay from the kalends of Martius to the kalends of Ianuarius, which is why New Year's Day is where it is).