Atomic Clock Sync references an atomic clock server in order to get the current time with the greatest accuracy available updating your PC's information. Atomic Clock Sync can help you optimize how often Windows references an atomic clock server, such as the atomic clock servers operated by the National Institute of Standards and Technology (NIST) in the United States.

This program connects to one of the time servers operated by the US National Institute of Standards and Technology (NIST), and will set the time of the clock in your computer with the atomic time-scale operated by NIST. Your current computer time is compared with the current atomic time and an adjustment is made to keep your local computer up-to-date with the exact time now. Atomic Clock Sync can even help repair the Windows Time Service if your computer is no longer able to check for Internet Time updates as it normally would. Best of all, you can download and use this utility at no cost to you!

This program has an option to run in AUTOMATIC MODE. When this option is selected, it will connect to the atomic clock 1 time per day and will not try to attempt another 24 hours.
If your system is not currently connected to the Internet, it will attempt to make a connection at regular intervals until a successful result is achieved, at which time it will not make any further attempts until the next day.

Simply to encourage you to use and return to World Time Server.com for the current times around the world. This tool helps keep your local clock accurate and we have the accurate clocks for everywhere else!
The overall certainty in the time comparison should be +/- 1 to 2 seconds.
For users behind firewalls, you may find it useful to know that Port 13 is used to connect to the NIST Atomic Clock servers. If this port is blocked, it may prevent Atomic Clock Sync from receiving time information.

The license of this software is Freeware, you can free download and free use this digital clock & timer software.