Internet UTC

Good day all,

I am developing a personnel access control app and I do not want to rely
on system time to record the events, I rather prefer to read time from an
Internet server at application initialization. Users are able to change
datetime on their computers, this is a requirement some times to operate
another app so I can not block access to the system clock.

Does somebody know about an Internet Time Server, how to access it and
obtain the time? Some code sample woud be great !

Thank you in advance for your help.

Sincerely,
Carlos Jones.


.