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/index.jsp server time check history

  • 2020-03-20 18:28:06 KST -11.259207
  • 2020-03-20 18:26:34 KST -11.638901
  • 2020-03-19 07:57:48 KST -11.085270
  • 2020-03-19 07:56:01 KST -11.116881
  • 2020-03-19 07:54:24 KST -10.723620
  • 2020-03-19 07:49:34 KST -11.429404
  • 2020-03-19 07:47:27 KST -11.088295
  • 2020-03-19 07:45:12 KST -11.093721
  • 2020-03-19 07:40:13 KST -11.078658
  • 2020-03-19 07:39:11 KST -11.137455
  • Average -11.1651412

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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.