I have set up a Network Time Protocol (NTP) server at ntp.threespace.com. It can be used to synchronize accurately the clock of another computer to the current time.
I may change the underlying software, but my intent is to keep this service up and running for a while. It would be helpful to know if this server is accessible to other Internet-connected computers. Please leave your feedback in the comments. Thanks.
PostScript One: Has Microsoft removed the ability to select manually a time server in Windows 10 or am I just missing something?