So is time base 60, or base 12, or base 10, or some confusing mixture. This would be the place to get an answer, I bet. I used to do payroll and make time calculations all the time, but it always involved mental gymnastics.

@Subumbral
If you'll but look at the numerals, you can clearly see that the mnumbers are base 10. 1 is not zero and neither is 12, and we're talking about a 12-hour dial when there are 24 hour dials.

And we're not talking about Roman numeral clocks where there's no such thing as a zero in Roman, but that's how our system of timekeeping started in the "western world".

You would do well to consider that our reckoning of metering out time is Roman based, plus what tweaks we've made since until the point where we define a second as a single cycle of the frequency of a certain atomic vibration, and for that see also The National Bureau of Standards.