Free Download World Clock Images
Dallas Whitmoyer
Over 30,000 mechanical Geochrons have been built over the years. From our shop in Portland, Oregon, we alone continue to build and restore these mechanical masterpieces for fine homes and businesses worldwide with enhanced features that were unavailable before 2015.
Have you ever wondered how the world clock works to keep everyone in sync? We live in different time zones, but from New York to Melbourne, a second is always a second. That's because everyone sets their local clocks using an internationally agreed standard called Coordinated Universal Time, also known as UTC.
UTC is defined by an agency of the United Nations called the International Telecommunication Union. It's based on two measurements: the ticking of hundreds of ultra-stable atomic clocks (International Atomic Time) and the rotation of the Earth (Universal Time). Nations across the world set their local time by adding or subtracting from UTC depending on their position on the globe.
UTC, or the world clock, has been around since the first day of the 1960s, shortly after Louis Essen built the first atomic clock. This precision timepiece promised to solve the centuries-old problem of second hands running too fast or too slow.
Before the 1950s, the most accurate clocks used vibrating quartz crystals to keep time, but the seconds would drift on a daily basis. Essen's invention used the quantum properties of caesium atoms to keep the crystals in sync.
Now, more than 400 extremely stable atomic clocks keep track of time the world over. Each one transmits a signal to the International Bureau of Weights and Measures in France. The Bureau compares them once a month to come up with a final number called the International Atomic Time (TIA). Each clock gets a different weighting in the calculation depending on how stable it is.
To account for this natural variation, the world clock also takes Earth's rotation into account. The International Earth Rotation and Reference Systems Service (IERS) measure Earth time, known as Universal Time, by watching the stars race past as the planet spins. They then combine this with International Atomic Time to get a final figure for Coordinated Universal Time.
To prevent the atomic clocks running away with themselves as Earth slows down, the IERS tries to keep Coordinated Universal Time and Universal Time to within 0.9 seconds of each other. This involves making regular adjustments called 'leap seconds'.
The first mechanical clocks didn't appear until the Renaissance. They used weights to move wheels to strike bells to indicate the hours. Later, inventors replaced gravity with springs and spinning wheels with swinging pendulums. Finally, in the 20th Century, the first quartz clocks were invented, making way for atomic time.
The most common clock oscillator is a quartz crystal. It vibrates thousands of times a second, generating a wave that rocks up and down in a predictable pattern. The trouble is, it's not completely stable.
To get around this, physicists have locked quartz crystals to the natural resonance of atoms. When exposed to precise frequencies, atoms change their energy state. Detecting these changes makes it possible to monitor the vibration of quartz crystals. So, when quartz clocks drift out of time, we can instantly correct them.
The Hirshhorn was a resonant setting for an artwork concerned with the global structuring of time. It was in Washington, DC, in 1884, that an international conference agreed on a single prime meridian, resulting in the system of time zones that Pousttchi navigated to create World Time Clock. Her photographs were also set against the circular form of the building itself, on which could be mapped both the face of a clock and the daily passage of the sun. The progressive shift in light and shadow over the course of the day asserted the turning of the planet and astronomical time, a telling contrast to the politically regulated version suggested by World Time Clock. Curated by Melissa Ho.
The new World Clock Apple Watch app offers a new functionality when scrolling with the Digital Crown and also makes it easier to check the time difference between your current location and other places around the world.
The main goal for me is to show the time in different locations to be able to know when to call my kids while out of their time zone.
The screenshots above are 2 separate images showing either 2 or 4 clocks.
This is something I wrote awhile ago and had to reuse. It's very simple in design so if anyone wants to spruce it up a bit be my guest and please share as well.
Time Zone Clocks.au3
Time Zone Clocks.au3
-Added a check to make sure InputBox's are numbers
-Decreased size of GUI to get rid of last line label
-Changed GUICtrlSetData to ControlSetText (increased speed of Data Function)
-Changed only to update Label's if different to avoid flickering
-Changed AdlibRegister from 900ms to 60ms*Number of Clocks (Maybe a little more CPU usage)
Time Zone Clocks.au3
-Added city code list to program
-Replace InputBox's with GUI to enter city codes
-Can search cities by typing in city name
-Now you can input all city codes in 1 input with a comma separating them i.e. 100,200,300
-Now just double click the city in the list to add to input
-Disabled editing of Input Box on starting GUI
-Added Error check for no cities selected
-Added AdlibUnRegister to prevent errors while closing
If you would like to make it more exact you can change AdlibRegister("Data", 900) to AdlibRegister("Data", 1) but this will cause issues with running a function within a function. I gave it 900ms so it would refresh faster than 1 sec but not to refresh when not needed. As they are updated, the more you have to update could cause slower updating in the loop. As with each clock that you have up and being checked there is a IE window created and hidden so that the GUI label is just refreshed from the information on the IE window (internet is needed).
With that said the more clocks you have and the less time you have in AdlibRegister could cause issues with trying to call the same function within the function. These may not be atomic correct times but for the purpose of what I used it for I didn't need it to be 100% accurate in seconds for each clock.
The best course of action then to produce the best results would be to get the TimeDiff from the start and end of function Data with only 1 clock then multiply that number by the number of clocks you want to display and have that time in AdlibRegister.
I tried doing this to maybe speed up things and maybe I'm going about it wrong trimming strings but after about 3-4 seconds with 3 clocks (which updates slower) it freezes and stops responding. I also increased the Data Function Adlib time to 500 and it still froze.
A Russian serviceman patrols the territory of the Zaporizhzhia Nuclear Power Plant on May 1, 2022. The Zaporizhzhia Nuclear Power Plant in southeastern Ukraine is Europe's largest and among the 10 largest in the world. (Editor's note: This picture was taken during a media trip organized by the Russian army.) Photo by Andrey Borodulin/AFP via Getty Images
In a world increasingly driven by sustainability and innovation, do-it-yourself (DIY) projects that repurpose everyday items have gained immense popularity. One such ingenious creation that blends environmental consciousness with functionality is the Recycled Project DIY World Clock. Crafted entirely from a discarded paint can lid, this project not only transforms a common household item into a stylish timepiece but also serves as a testament to the possibilities hidden within everyday materials.
Educational Value: This DIY World Clock provides an excellent platform for learning about basic timekeeping mechanisms and clock assembly. It encourages students and hobbyists, to delve into the mechanics of timepieces, fostering a greater understanding of how clocks operate.
Whether through design, architecture or function, this is our choice of the top ten most famous clocks in the world. All are closely linked to the social and political history of their locations or commemorate a specific event in world history. Many are so iconic that a mere mention of their parent city conjures their image in the minds eye. Each example features unique design elements or an iconic look that defines the character of their surroundings. Although they are no longer the only reliable timepiece for local inhabitants, their importance as landmarks is undiminished.
Originally built in 1410, this is mounted on the southern wall of the Old Town Hall in the Old Town Square in Prague, Czech Republic. It is the third oldest astronomical clock in the world and thought to be the oldest operational clock in existence. Its astronomical dial has 21 different functions, including movement of the moon, lunar phase and position of the sun through the day. Four animated figures representing Death, Vanity, Lust and Greed flank the clock face, moving in response to Death ringing a bell on the hour. Additionally, each hour two shuttered windows above the face open and painted statues of the twelve Apostles move in procession past them. During renovation in 2018, an electric mechanism from the 1940s was replaced by an original 1860s clockwork mechanism.
Located on the Alexanderplatz in Berlin, Germany, the Urania World Clock stands on the site of a wrecked pre 1940s clock discovered in 1966. It was opened to the public in 1969 to coincide with the twentieth anniversary of the GDR. Standing over 10 metres high, its design could not be further from a traditional clock tower. Above a stone mosaic depicting a compass rose stands a 2.7 metre column with four attached clock faces. This is surmounted by a 24 sided drum, with each face representing a world time zone. 148 cities are listed according to time zone and a numbered cylinder rotates in the middle. By observing the relevant time zone and its position relative to the numbered column, the approximate time for a listed city can be measured. The whole structure is topped by a steel model of the solar system which rotates once each minute.
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