NKO Atomic Clock

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

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

  • 2021-09-03 08:14:48 KST -8.238592
  • 2021-09-03 07:59:36 KST -8.212441
  • 2021-09-03 07:58:23 KST -8.250792
  • 2021-09-03 07:56:53 KST -8.178096
  • 2021-09-03 07:55:36 KST -8.231683
  • 2021-09-03 07:49:43 KST -8.199035
  • 2021-09-03 07:44:07 KST -8.222119
  • 2021-09-03 07:39:36 KST -8.205505
  • 2021-09-03 07:37:51 KST -8.193980
  • 2021-09-03 07:27:19 KST -8.183615
  • Average -8.2115858

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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.