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Duodecimal time units

Base unit: hour

Submultiples: dh (5 minutes), ch (25 seconds), mh (~2 seconds), ssecond (shorthand for half a mh)

Multiples: dah (12 hours), day (shorthand for 2 dah)

08:20:14 can be written as 08.411 or 08.41:2

Pros:

* Easy pseudo-metric conversions

* Easily divided by 2/3/4/6/12

* Clock is read as is, quarter past 8 is 8.3h , half past 8 is 8.6h

Cons:

* Sseconds are slightly longer than seconds (1 ss = 1.041666... s)

* No clean way to refer to minute-like units (2 ch or 3 ch?)

* Requires two more symbols (X and E)



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