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Time Synchronization

Anuko World Clock can synchronize your PC time with an internet time server. You can configure the options on the Time synchronization page in Preferences.

Time synchronization page in World Clock Preferences
Time synchronization page in World Clock Preferences


The options on the Time synchronization page are:

  • Automatically synchronize with an Internet time server – allows you to specify the intervals in which Anuko World Clock will synchronize the system time to be accurate to the second. Choices are every day, every hour, every 15 minutes, 5 minutes before alarms (the alarms that you have configured), and 5 minutes after Windows starts (after restarting your computer).
  • Server – allows you to choose which internet time synchronization server World Clock will synchronize the system time with.
  • Update Now – forces World Clock to synchronize the time immediately. You will see the results and the last time Anuko World Clock successfully synchronized the time below this button.

Selecting a Time Sync Server

The Server dropdown on the Time synchronization page contains a few entries for time servers to use. It is recommended to use pool.ntp.org. It is a distributed system of multiple time servers that work together as a pool to share the load. You can also try other built-in time servers, or type in your own time server name or IP address into the Server field.

Time synchronization servers that are built into World Clock
Time synchronization servers that are built into World Clock


Troubleshooting Time Synchronization

For time synchronization to work, the network between your computer and a time server must allow Network Time Protocol (NTP) traffic that utilizes User Datagram Protocol (UDP) on port 123. In some environments this kind of traffic is blocked. If it happens to you, then using any of the top 7 time servers from the picture above will not work.

If you use a firewall make sure that the timesync.exe process is allowed to communicate over NTP protocol to external systems. timesync.exe is a component of Anuko World Clock, which runs as a Windows service and sets the computer time.

As a workaround for this issue, World Clock has an alternative way to synchronize the time with a web server of your choice. If you can browse the web, you can sync the time with any trusted web server instead. Three examples of such servers are built into World Clock. They are on the bottom of the list above and start with http. Use http time synchronization only when NTP method does not work.

World Clock User Guide