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

  • 2021-01-26 14:57:10 KST -26.264685
  • 2020-11-17 07:57:43 KST -3.156994
  • 2020-11-17 07:54:43 KST -3.168459
  • 2020-11-17 07:50:57 KST -3.135240
  • 2020-11-17 07:49:56 KST -3.197969
  • 2020-11-17 07:45:46 KST -3.195072
  • 2020-09-03 07:59:40 KST -2.537627
  • 2020-09-03 07:52:02 KST -2.548797
  • 2020-09-03 07:50:52 KST -2.568154
  • 2020-09-03 07:49:22 KST -2.519321
  • Average -5.2292318

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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.