NKO Atomic Clock

Current time in milliseconds unit, dday remaining time calculator, elapsed time, stopwatch, server time checker

☞ Install NKO Atomic Clock(Android app) at Google Playstore
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https://ysweb.yonsei.ac.kr server time check history

  • 2019-08-12 09:28:15 KST -1.404776
  • 2019-08-12 08:59:50 KST -1.374387
  • 2019-08-12 08:58:20 KST -1.392576
  • 2019-08-12 08:57:10 KST -1.364705
  • 2019-08-12 08:56:02 KST -1.354918
  • 2019-08-12 08:54:34 KST -1.376314
  • 2019-08-12 08:50:15 KST -1.352533
  • 2019-08-12 08:48:24 KST -1.340659
  • 2019-08-12 08:46:10 KST -1.402934
  • 2019-08-12 08:45:10 KST -1.334462
  • Average -1.3698264

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We fetch a server clock and let you see

Webservers transmit their time in seconds unit, so without special treatment, the maximum error would be as big as 1 second. NKO Atomic Clock calculates a server time more than ten times in 1 second and seize the moment when the second changes. Thus we can minimize the calculation error as small as 0.1 second. Moreover, delays between our server and a destination server are considered so the accuracy of time increases.

NKO supports the HTTPS protocol and subdomains

Some servers use different servers over protocols or subdomains. You can get a desired result by specifying more details.


# You need to tell us an exact server address. For example, some sites host differently by whether the address begin with WWW or not.

# Even if your computer clock isn't synchronized, NKO always will display correct time.

# If you click a numeric time error in the history view, the clock will use that measurement.

# The results can have quite much error if the destination server is under load balancing. Please refer to a variance in the server time history information.

# A particular service uses its own time clock, different with web servers' clock. in this case, server time guessing is not meaningful.