Service exact-time.org provides exact time in any place around the world. You can get correct time with accuracy about 1 second on this site. You should use our NTP servers startum 1 - ntp.exact-time.org and ntp2.exact-time.org to get better accuracy (about 10 µs and less).
Our NTP servers are syncronized by GPS and have precision about 1 µs that is more than enough for internet server, desktops and other high accuracy time measurements.
Clocks for web site provide precision about 1 s (depends on user internet connection and how busy user's computer is). These clocks on your web site can show current exact time in user's location, current date and can signalize if user's time isn't correct.
Finaly, our NTP and web service is better cause it's working in both IPv4 and IPv6 networks. All technical details...