But don’t call it hexadecimal time or something so painfully
nerdy. Keep the seconds the same duration, keep the minutes
the same duration, only there are different amounts of both.
They’re still called seconds and minutes. Hours: instead of
twelve and then another twelve, have sixteen.

This
would fit our natural attention cycles, and many other of
our circadian rhythms fall into 45 minute zero crossing / 90
minute peak-to-peak interval durations. The current hour is a
ridiculous duration, it doesn’t fit our body’s organisation
process well at all.

Frankly, this whole scheme looks suspiciously like the
French Prandial Time, which was devised to allow the
traditional 4 hour French lunch-break to fit within
the traditional 4 hour French working day.

But a day has twenty four hours..... making eight o'clock
the same equivalent as twelve o'clock in a sixteen hour day
methinks. (Joins in the attack as an excuse to promote idea
of having pi hours in a day, based on geometric ratios of
circles, with moving arcs describing time in a way that no
one can really enumerate exactly.)

In the US, on 12 hour time, we do refer to
midnight as 12:00, 15 minutes later as 12:15. I
know on 24 hour time, it tends to be referred to as
0:15. But since there would be no difference
under this plan, you could just use the US
model.

As far as the plan, 16 divides evenly by 2, 4 and 8.
24 divides evenly by 2, 3, 4, 6, 8, and 12. That's
an advantage for 24 hour time. The recommended
8 hours of sleep, or the nominal work day is 1/3 of
a day. That 5.333333 repeating under this plan.

So you would have to work twelve hours (8 of your new ones) before getting time and a half ? I don't think the unions will be pleased. A lunch hour would be how long ? 1/16 of the day instead of 1/24th ?

So, if we want to find advanced alien societies, we program the telescopes to look for solar systems where a planet's diurnal cycle is a power-of-2 division of the year.