Here is an interesting method of receiving 15 seconds of correct time from the United States Naval Observatory. Reloading the page will restart the display.
If you are using a modem, the above image might not update quickly enough. You might try using a telnet connection to time servers known as:
Washington DC:
St. Louis (Washington University):
Colorado Springs:
Massachuetts (MIT):
Palo Alto (Digital Equipment Corporation)
A little patience is required. It seems that some servers are more busy than others at times.
The Berkley Software Distribution (BSD) site maintains a time server with translation for various areas of the world. Setting a watch by this method is a bit tricky, it is suggested you preset your watch and perform a reload document function to obtain a reasonable time match. After that, transfer the time from your watch to your system.
If you have access to an AM mode shortwave receiver, you may hear time signals from:
Many broadcast AM radio stations play a network tone before the hourly news. This tone is usually about 4 seconds after the top of the hour, allowing the announcer to mention the call station identification at the top of the hour.