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://portal.yonsei.ac.kr/main/index.jsp server time check history

  • 2022-09-05 07:59:57 KST -1.380291
  • 2022-09-05 07:57:50 KST -1.384604
  • 2022-09-05 07:06:52 KST -1.634544
  • 2022-08-30 17:43:52 KST -5.961278
  • 2022-08-30 17:12:47 KST -5.984057
  • 2022-08-30 17:10:24 KST -6.009635
  • 2022-08-29 05:11:22 KST -5.508583
  • 2022-08-24 08:58:05 KST -3.050797
  • 2022-08-24 08:54:05 KST -3.039567
  • 2022-08-24 08:51:50 KST -3.045341
  • Average -3.6998697

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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.