Dozenal Society of America

04/14/2026

The five iOS apps that Dr. Rapoport mentioned here and has improved recently have a guide at https://dozenal.ca/suite/ . Anyone with an iPhone or iPad running iOS 18 or higher who wishes to join the group of people testing the apps is welcome to ask how to do so. No cost.

The Dozenal Suite is a set of five apps for dozenalists! They’re usable on Apple’s mobiles (iPhone and iPad, with a minimum of iOS 18) and are described below.

02/04/2026

Lastly for now, an image of a recently created dozenal digital alarm clock for Apple's iOS devices. Getting it to sound like an alarm clock is not straightforward, but it can be (and has been) done.

02/02/2026

The clock widget for the iPhone lock screen shown elsewhere here has led to something more elaborate. On the top left of the home screen below is a version of the time, on the right are temperatures. The latter numbers are in what are known as stadegrees crystallic. Other scales are possible.

These are two separate widgets. The temperatures may change every twenty minutes (two dozen trices).

01/28/2026

Here's an example of dozenal diurnal time on an Apple iPhone's lock screen. In this case, the day starts at 6 AM traditional time. Most people would add 300 to it to get 642, starting the day (000) at midnight.

02/25/2025

With dozenals, it's easy to start the day's time count at any traditional hour. Midnight makes sense, of course. So do 4 AM, 6 AM, 8 AM, and maybe others. All you need is a clock or watch that starts 000 at your chosen time and a calendar that still changes dates at traditional midnight.

It's also possible to use negative numbers from midnight to the start of the time count, which seems easier than keeping the count going in positive numbers until 000 is reached.

In the photos below, -000.1 loses its negative sign (to save space) but is in a different color from that of the next number, 000.0, which begins the positive numbers, in white.

12/21/2024

These wristwatch photos were taken as the year changed a short time ago, with the large numerals showing dozenal diurnal time. The year changed from 6857 to 6858 at the December solstice, in a calendar system used by the watch's producer.

The rest of the calendar display is months-weeks-days but *elapsed,* or completed: on the left, ↋ months plus 4 weeks plus 5 days, there being 26[z] days in the dozenth and last month of the year in this calendar. (To most people, the date is December 19[z], 1208[z].)

On the right, the 0-0-0 in the date shows that zero months, zero weeks, and zero days have been completed. An elapsed date is cardinal rather than ordinal. The watch can also show ordinal, which would be 01-01 here, the first month and the first day, which is what most people are used to on the traditional calendar. On the left the ordinal date would have been 10[z]-26[z].

The watch cannot switch this display to base ten (decimal) or to the traditional time and date throughout the year, because its code produces only the sort of thing you see here.

11/10/2024

This school year in North America, a new project is in progress: creation of an electronic Gin Rummy game. To the usual deck are added ↊ and ↋, plus a face card (a knight, essentially, placed between the jack and the queen), all in each suit. The 10[d] card is replaced by 10[z], of course. The new deck consists therefore of 54[z] cards, 14[z] in each suit.

All the electronic (and physical) cards were created in dozenal a few years ago by Jean-Louis Cazaux, the renowned expert on chess and chess variants.

08/04/2024

The DSA has recently assisted the creation of truly dozenal rulers in two sizes. Both present Primel lengthels along with metric centimeters and Imperial inches; the sizes are 30[z] and 60[z] Primel lengthels. (Note that 30[z] Primel lengthels are almost the same as a TGM grafut, and 11⅝[d] inches exactly.)

The rulers are in brushed stainless steel with precise laser etching, created by a master designer and engineer. The DSA highly recommends them. Go to

10/17/2017

This past Friday, the DSA met in Atlanta. We heard a talk by a young lady named August who had dozenalized Napier's Bones and met a precocious boy from Dallas, now 11, who at age 6 described the binary and dozenal systems. Thank you to all who visited! We look forward to seeing you, possibly once again in Atlanta, next year. Visit the DozensOnline Forum for more on the Annual Meeting!

09/02/2016

Join us for the Annual Meeting of the DSA, Friday 30 September 2016 (*26 September *1200) from 9 to 5, 1170 AMA Executive Conference Center, Peachtree St NE #300, Atlanta, GA 30309. Meet us for lunch or hear our afternoon presentations! (Please notify us on fb so we know you'll be coming.) http://www.amaconferencecenter.org/atlanta.htm

The Atlanta Executive Conference Center is state-of-the-art and is comprised of 13 comfortable executive meeting rooms that range in size from 154 to 2640 square feet. The center can accommodate meetings up to 175 participants.