NKO Atomic Clock

Current time in milliseconds unit, dday remaining time calculator, elapsed time, stopwatch, server time checker

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우리말 English

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

  • 2021-09-26 14:45:08 KST -19.917799
  • 2021-09-26 14:38:24 KST -19.880355
  • 2021-09-03 07:59:28 KST -9.303011
  • 2021-08-25 08:58:05 KST -5.340324
  • 2021-08-25 08:45:38 KST -5.326704
  • 2021-08-25 08:09:26 KST -5.346181
  • 2021-08-19 07:40:51 KST -2.680262
  • 2021-08-19 07:38:53 KST -2.627755
  • 2021-03-26 15:17:07 KST -13.106702
  • 2021-03-26 15:14:04 KST -13.103564
  • Average -9.6632657

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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.