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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우리말 English

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

  • 2020-02-17 09:58:43 KST -1.850169
  • 2020-02-17 09:57:38 KST -1.884389
  • 2020-02-17 08:53:29 KST -1.838709
  • 2020-02-12 13:33:33 KST -16.909591
  • 2019-11-19 07:59:25 KST -43.994483
  • 2019-11-19 07:58:01 KST -43.981830
  • 2019-11-19 07:54:10 KST -44.234807
  • 2019-11-19 07:26:43 KST -24.302809
  • 2019-11-19 07:25:34 KST -24.340343
  • 2019-10-13 08:16:00 KST -10.347200
  • Average -21.368433

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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.