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://portal.yonsei.ac.kr server time check history

  • 2018-10-27 03:41:32 KST -0.065735
  • 2018-09-06 07:16:29 KST -0.057560
  • 2018-09-06 06:49:45 KST -0.013675
  • 2018-09-06 06:47:54 KST -0.010339
  • 2018-08-28 08:58:08 KST -0.045791
  • 2018-08-28 08:56:48 KST -0.050607
  • 2018-08-28 08:55:39 KST -0.030288
  • 2018-08-28 08:48:46 KST -0.058253
  • 2018-08-28 08:46:54 KST -0.046498
  • 2018-08-28 08:43:43 KST 0.005371
  • Average -0.0373375

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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.