NKO Atomic Clock

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

Chatroom by domain
우리말 English

https://ysweb.yonsei.ac.kr/websquare/websquare.jsp?w2xPath=/wq/sg_main.xml server time check history

  • 2021-09-08 03:41:27 KST -11.485023
  • 2021-09-03 08:10:41 KST -7.977388
  • 2021-09-03 08:07:15 KST -6.667843
  • 2021-09-03 08:03:53 KST -8.425302
  • 2021-09-03 08:02:06 KST -5.940347
  • 2021-09-03 07:59:41 KST -9.356396
  • 2021-09-03 07:58:40 KST -9.353520
  • 2021-09-03 07:57:39 KST -9.309947
  • 2021-09-03 07:56:39 KST -9.330756
  • 2021-09-03 07:55:37 KST -9.332351
  • Average -8.7178873

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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.