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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http://portal.yonsei.ac.kr/main/indexw.jsp server time check history

  • 2019-09-05 06:57:08 KST -0.068279
  • 2019-07-11 17:24:55 KST -0.030761
  • 2019-02-26 08:18:47 KST -0.049766
  • 2018-10-26 21:59:36 KST 0.006211
  • 2018-09-06 07:30:22 KST -0.000675
  • 2018-09-06 07:14:07 KST -0.065622
  • 2018-08-28 08:37:52 KST -0.037500
  • 2018-08-26 18:23:02 KST -0.032779
  • 2018-08-26 18:18:54 KST -0.007904
  • 2018-08-26 18:15:56 KST -0.042037
  • Average -0.0329112

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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.