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

  • 2019-08-24 18:39:08 KST -2.831700
  • 2019-08-22 21:43:51 KST -2.128858
  • 2019-08-22 21:42:27 KST -2.188143
  • 2019-08-22 21:39:57 KST -1.992034
  • 2019-08-22 21:38:09 KST -2.121915
  • 2019-08-22 21:37:02 KST -2.168990
  • 2019-08-12 08:53:45 KST -1.008795
  • 2019-07-17 13:11:09 KST -5.754094
  • 2019-05-14 07:55:10 KST -2.518105
  • 2019-05-14 07:45:34 KST -2.514033
  • Average -2.5226667

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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.