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://yswep.yonsei.ac.kr server time check history

  • 2019-12-03 05:05:49 KST 0.587276
  • 2019-04-10 16:37:50 KST 2.146116
  • 2018-09-06 07:57:42 KST 0.480441
  • 2018-09-06 07:51:49 KST 0.522336
  • 2018-09-06 07:46:57 KST 0.446198
  • 2018-09-06 07:43:44 KST 0.485037
  • 2018-09-06 07:35:59 KST 0.433497
  • 2018-09-06 07:31:55 KST 0.478907
  • 2018-09-06 07:27:12 KST 0.410246
  • 2018-09-06 07:25:40 KST 0.450068
  • Average 0.6440122

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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.