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/busTest/index2.jsp server time check history

  • 2021-12-04 10:39:17 KST -14.846629
  • 2021-09-28 09:48:44 KST -20.785048
  • 2020-10-24 23:44:34 KST -18.666654
  • 2020-03-19 07:14:36 KST -2.588840
  • 2019-12-03 13:58:29 KST -2.100152
  • 2019-11-30 13:52:49 KST -1.135438
  • 2019-11-27 13:56:19 KST -2.762898
  • 2019-11-26 13:34:10 KST -2.289524
  • 2019-11-23 13:45:50 KST -1.159687
  • 2019-11-19 13:58:51 KST -35.132161
  • Average -10.1467031

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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.