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/ server time check history

  • 2021-01-26 14:13:21 KST -14.507980
  • 2020-09-03 07:59:26 KST -2.495043
  • 2020-09-03 07:57:15 KST -2.507597
  • 2020-09-03 07:55:16 KST -2.485584
  • 2020-09-03 07:52:00 KST -2.482846
  • 2020-09-03 07:50:53 KST -2.528997
  • 2020-09-03 07:47:14 KST -2.521767
  • 2020-09-03 07:37:10 KST -2.481816
  • 2020-09-03 07:16:48 KST -2.520849
  • 2020-09-03 07:15:28 KST -2.469110
  • Average -3.7001589

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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.