If you know any more, please let me know - or write one! A few more Windows examples would be good to have.
MacOS X Screensavers
Open these in the System Preferences>Desktop and Screensavers pane.
Greenwich Observatory Shepherd Clock screensaver (MacOS X)
In 1852 Charles Shepherd installed a new clock outside the gate of the Royal Observatory at Greenwich. This was an electrically operated clock, one of the earliest ever made, and it was controlled by a master clock mechanism inside the main building.
This screensaver is a reasonably accurate simulation of this famous clock.
One-handed screensaver (MacOS X)
This one-handed 24 hour clock screensaver was inspired by the UNO-24 watch by Botta-Design.
I added a GMT/UT0 hand, but I'm not sure if it works well outside GMT-land.
(It doesn't make any sounds. That's just a zen reference.)
This is a fairly accurate copy of the Glycine Airman Double 24 09. I've been reading about the Glycine Airman in André's excellent book "Glycine Airman: a 24 hour timeline of flight" (more here).
TimeDisc (MacOS X)TimeDisc is a clever, ingenious, and elegant clock that uses coloured sectors. The clock can float over other windows, and can be transparent too. It also can appear in the Dock and in the menu bar. Andreas Mayer, the author, has added a 24 hour option.
TimeDisc for iPhone and iPadAndreas also issued his TimeDisc for iOS and iPad. Find it on the App Store.
Link to US App Store
24h Analog Clock Widget (Android)
Here's a neat 24 hour clock for phones running Android, from Steve at staticfree.info. You can read about it here.
Max Emerson's Yahoo widget can be downloaded from Softpedia. It says Windows, but it's probably Mac as well.
WorldTimeServerThe WorldTimeServer site provides Flash clocks that you can embed in web pages, and in the Windows Vista sidebar. For Windows Vista, visit WorldTimeServer.com:
If you're using Apple MacOS X Leopard, by the way, you can easily make any web page (or any item from a web page) into a new Dashboard Widget. Visit the web site in Safari, then choose File>Open in Dashboard. Follow the instructions... !
Life-Clock for iPhoneChris Weigman has launched a KickStarter campaign to build 24 hour clocks for real. You can find a matching iOS App on the App store.
Link to US App Store
Sol for iPhoneThis iPhone app is called Sol, written by Alexander Valys (web site sol.avalys.net. It's an elegant sun clock showing the rising and setting times of the sun for a number of locations, ona 24 hour dial (12 noon at the top, 24:00 at the bottom). There have been a few problems with this recently, though, as the author appears to have suffered some ISP problems.
Active Earth (Windows)ActiveEarth is a software clock that runs on Windows computers. It provides a number of different 12 hour and 24 hour styles, including this one:
You can buy this from Active Earth.
Watchmaker for PalmWatchmaker for Palm has an interesting 24 hour option with abbreviated city names around the edge.
Flash (Flash-aware web browser)A Flash clock was kindly sent to me by Juan Carlos Tejedor, from Zaragoza (Spain), who says that he first saw a 24 hour analog clock in an episode of ER on TV. He modified an example supplied by Macromedia.
Download (SWF file)
iPhone web applicationThis web page has been designed specifically to work on an iPhone or iPod Touch as a web application . In fact, I suspect that it won't work in any other browser apart from Safari. The artwork is mostly in PDF, for one thing.
If you have an iPhone please try this out, and let me know what you think!
Note that a single tap will rotate the dial so that 12 or 24 is at the top. The red hand is supposed to show GMT.
Shepherd Gate Clock for iPhoneHere's a familiar sight: the famous Shepherd Gate Clock at Greenwich, London. The Shepherd Gate Clock (this link is a link to the App Store) costs a modest dollar. I'm assuming that this is a genuine 24 hour analog clock. The time here is 20:10. It's going to look a bit odd at midnight, with that sunlit brick wall...
iWatch for iPhoneThis next one is a puzzle. It's called iWatch, and it features an attractive rendering of three watches, including this Patek Phillippe watch with a 24 hour rotating dial. What looks like the hour hand is really the minute hand, and what looks like the minute hand is really the second hand. So the time on this picture is about 04:18:49.
(I'm not a big fan of the design, to be honest. The map is coarse, and that font isn't attractive.) The real puzzle, though, is why this app is suddenly no longer available on the App Store, now that I want to provide a link to it.
25h for iPhoneNot strictly a 24 hour clock, this excellent app is called 25h:
The idea is simple:
Feeling overstretched? 24 hours in a day is not enough? Then 25h is a clock for you.I know some people who set their watches fast - this is an interesting alternative.
Trick yourself into having 25 hours in a day. Get things done faster and have an extra “hour” for yourself.
Note that 25h does not modify time–space continuum (or your biological clock) to give you an extra hour. It simply makes the rest of your hours appear a little shorter so that enough time is saved for an additional shorter “hour” at the end of the day.
Chromachron 24 hour screensaver (MacOS X)This screensaver is a version of a fascinating watch designed in the early 1970s by engineer and designer Tian Harlan. I've made a 24 hour version as a screensaver for MacOS X, using Quartz Composer.
The Chromachron time display method was invented by artist and designer Kristian Harlan in the 1970s. 'Tian' Harlan was born in Berlin, in 1939. He studied Architecture in Berlin and became a qualified engineer. In 1972 he designed the Color Time sculpture for the Olympics Games in Munich. In 1973 he released the first Colour-Time graphics and objects. The Colour-Time watch, which had a mechanical movement, was manufactured by Chromachron A.G. in Germany.
On a Chromachron device, the time is indicated by the color and angle of a slit in a rotating disc. Beneath the disc the circle is divided into 24 sections (in the original 12 hour version, the disk was divided into 12 sections). Time is indicated both by the color of a slit in a revolving disk, and by the angle of the slit (similar to the hour hand of a conventional clock). The disc revolves at the speed of one coloured segment per hour, so that it is not possible to read the exact time: five minutes before twelve is read as "a short time before yellow".
This approximate time measurement system was described as 'ending the dictatorship of the exact time'. In total, Harlan designed approximately one hundred different watches. His work has been exhibited in Berlin, London, Amsterdam and Paris. It's said that his Colour-Time watches were worn by, amongst others, Ringo Star, Max Bill, Charles Aznavour, and Carlo Levi.
More about the Chromachron here:
- Java applet version of Chromachron
- gchrom, a Chromachron software clock for X GNOME
- Chromachron for windows
Update: Craig Lawson added some more features to my first version. The download link below now downloads his version. Thanks Craig!
Download (MacOS X only).
Nebula CDateTime clock widget (Java)
Software people don't always provide a 24 hour analog clock widget in their applications, but it's a good idea - if only because it spares users who don't like AM/PM having to specify times using these options. Here's a more enlightened developer - Jeremy Dowdall - who has designed the Nebula CDateTime widget for Eclipse:
It looks to me like it would be much easier to set the time using this widget than a 12-hour widget. What do you think?
MacOS Quartz Clock (MacOS X)Chris Kent has written a nice clock application for MacOS and added this 24 hour option. No minute hand!
Unfortunately his web site appears to have closed, but you can probably still find this available for download somewhere.
Keith's astrolabe (Java-capable computer)It's not strictly just a clock, but when run as a Java applet, these astrolabes can keep the time, using the 24 hour dial. They're more for educational purposes, though, and for exploring the motions of the solar system. A lot of medieval astronomical clocks used astrolabe-type displays, and learning about them is easier when you have a software astrolabe to play with. This is an amazing simulation:
Go to Keith's astrolabe page
World clock Dashboard widget (MacOS X)If you're running MacOS X Tiger, take a look at this neat Dashboard widget.
The earth moves anticlockwise, as of course it really does... You can get it at DashboardWidgets.com
Java clockAntony Pranata wrote an excellent Java clock, which I've modified to show the time using the 24 hour system.
Download (Java class file) Download (Java source file)
You can see the clock in action at André's site, which is the definitive guide to 24 hour watches.
Screen saver (MacOS X)One of the whizzy new features available in the latest MacOS release (10.4) is the Quartz Composer, a graphical programing environment for creating animated visuals. Quartz composer is free with every copy of the OS. I'm neither a programmer or an artist, but I've managed to copy and paste a few bits of code to produce this 24 hour analog clock screen saver. Expect the usual swooping rotating text and churning cycling gradients.
Tasteless but fun.
Download (MacOS X only)
World Clock Dashboard widget (MacOS X)I've modified Apple's World Clock Dashboard widget to provide 24 hour analog time.
I'm still learning about Dashboard, and how to make the graphics, so consider this a work in progress.
Download (MacOS X)
Simple Clock24 (MacOS X)This is a simple 24 hour analog clock application, based on Apple's Clockview source code. This is a very basic application, with hardly any features, and no professional polish other than what Apple supplied. I haven't a clue how to add new features - it was easy however to make the necessary maths adjustments to convert the 12-hour analog clock code to 24 hour operation.
Download (MacOS X DMG file)
iPulse (MacOS X)
iPulse is a fabulous system monitoring tool/widget/gadget, which shows about 250 system parameters using a combination of dials, gauges, and floating windows.
The developers saw the wisdom of providing a 24 hour clock mode (there's a 12 hour clock mode too, for backwards compatibility).
Visit the IconFactory to find out about iPulse. Unfortunately it's been 'kind of' discontinued by the developers.
The Electric Astrolabe (Windows/Dos)The Electric Astrolabe is a fully animated planetarium program in the form of a planispheric astrolabe.
The singular advantage of the astrolabe display, it claims on the web site, is that it shows the entire sky, both visible and invisible, on a single screen. Unlike a static instrument, The Electric Astrolabe can be set for any location and includes accurate positions of the Sun, Moon, and planets. In addition, The Electric Astrolabe includes over 150 stars which can be displayed as constellation asterisms and all of the Messier objects. Either a north or south projection can be shown. You can also display the phase of the Moon, Jupiter's moons, Saturn's rings, lunar eclipses and the phases of the planets at any time. The color of the sky above the horizon changes from blue, through twilight gray to black depending on the position of the Sun.
Also included are an animated orrery showing the planetary orbits and several text screens giving precise solar, lunar and planetary positions, a help screen and several screens for customizing the program to your location and choice of colors and making it easy to use.
PalmOS clock (PalmOS)This is a 24 hour analog clock for your PalmOS handheld computer. This is a demonstration of the power of the DragonForth development environment. The original clock code was written by Dmitry Yakimov, at www.delosoft.com. I've adapted it for 24 hour analog operation. It used to work with PalmOS 3.5. I don't know whether it works on more recent systems.
Zenmai (MacOS 9 and X)
This application is a free clock-construction kit, with the ability to define 12 and 24 hour analog and digital clocks. You can play with it for hours! The clocks you build run natively in OS X in floating, transparent windows, although the editor is a Classic-only application.
Here's a screen shot of two of my first attempts. Both are noon at the top designs. The smaller one is a conventional hand-based style, the lower one is a playful investigation into a different style using dots instead of hands: the red dot shows the seconds, the green dot the minutes, and the yellow 'sun' dot the hour. Both clocks are translucent.
Visit the Zenmai clock site.
SVG (any SVG-aware web browser)This is a simple 24 hour analog clock, with a nice sweep second hand. There are various keyboard shortcuts for zooming in, out, and panning.
The clock can lose the current time if your computer sleeps. This is probably because it's just a demo of SVG, rather than a proper clock.
At the moment I can't see how to get this file to display in a web page. Adobe says that this will work: Click here to open the SVG file. But I don't believe it's that easy...
Download (SVG file)
Alarm Clock (Windows or Linux: FLTK)Bernd has written a free alarm clock program to try out the FLTK toolkit for making GUIs and things like that. It has a 24 hour analog option.
Islamic 24 hour clockAli Adams has produced a 24 hour clock in Java designed to support Islamic daily prayers.
The five extra hands you see are the calculated times for the 5 daily ritual prayers. Read more at Wikipedia: Salat.
Download (Java files in ZIP archive)