Command-line tool to ask remote server for current date-time
You can use sntp as standard query tool for either NTP or SNTP servers. You may get, set or adjust the time on your host with it.

E.g.

sntp time.euro.apple.com


shows the time

sntp -d time.euro.apple.com


shows a more verbose response including the current time.

Check man sntp or in the shell man sntp for more options.