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The Dozenal Society of America

The DSA is a voluntary, nonprofit education corporation, organized for the conduct of research and education of the public in the use of dozenal (also called duodecimal or base-twelve) in calculations, mathematics, weights and measures, and other branches of pure and applied science.

UncialClock Deluxe

Name:	UncialClock Deluxe
Type:	utility
Summary:	A Java program displaying three types of dozenal clock, analog and digital.
Author:	John Kodegadulo
Version:
Nature:	Download
Download:
Location:	Download from Sourceforge

This Java program by John Kodegadulo shows three analog clocks with digital readouts and brief explanations:

"Diurnal" clock: Based on the day divided into twelve parts of two hours each.
"Hybridiurnal" clock: Based on the half-day, divided into twelve parts of one hour each, with certain units taken from the diurnal clock.
"Semidiurnal" clock: Based on the half-day consistently divided into twelfths; this is a TGM clock.

It requires a relatively recent version of Java, and unfortunately the online documentation seems significantly out of date. However, this analog and digital clock provides an excellent introduction to dozenal timekeeping.