NKO Atomic Clock

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

☞ Install NKO Atomic Clock(Android app) at Google Playstore
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https://portal.yonsei.ac.kr/main/ server time check history

  • 2021-05-25 07:59:12 KST -0.331855
  • 2021-05-25 07:57:18 KST -0.312199
  • 2021-05-25 07:46:20 KST -0.354431
  • 2021-05-25 07:43:13 KST -0.360791
  • 2021-05-25 07:34:25 KST -0.306548
  • 2021-05-25 07:26:05 KST -0.370226
  • 2021-03-26 15:19:02 KST -14.174985
  • 2021-03-05 07:59:05 KST -2.822697
  • 2021-03-05 07:57:54 KST -2.827956
  • 2021-03-05 07:56:29 KST -2.834069
  • Average -2.4695757

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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.