Time server for Android If I have an Android device that has no internet connection and I would like to use a PC as a time server. What should be the right procedures?

Is it that I should install a NTP server on my PC and then .....? How can I set the Android device to detect the time from the time server on my PC?

Thanks!
That should be the correct approach. As you noted, time sync needs a source -- so setting up a NTP Server on the PC will provide this source. Now you need to have some NTP client on your Android device. Searching Google Play for "ntp" brings up two of them right on the first page: ClockSync (I use this one, and am quite happy with it; still running it with the default NTP server configured -- but in your case, you will have to change this: as you can edit the time server used, this should be no issue), and NTPSync - Time Synchronization are two examples running in the background. If you prefer something permanently visible, Atomic Clock Wallpaper seems to be a candidate. Just follow the search link for more candidates :)