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/main/index.jsp server time check history

  • 2019-09-16 03:28:27 KST -11.444984
  • 2019-09-05 07:55:34 KST -7.282391
  • 2019-09-05 07:50:01 KST -7.327340
  • 2019-09-05 07:48:48 KST -7.333157
  • 2019-09-05 07:47:41 KST -7.295295
  • 2019-09-05 07:45:48 KST -7.329569
  • 2019-09-05 07:37:53 KST -7.247884
  • 2019-09-05 07:35:02 KST -7.302066
  • 2019-09-05 07:33:40 KST -7.324474
  • 2019-09-05 07:32:38 KST -7.283753
  • Average -7.7170913

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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.