4 ms·

But be aware with your celebration. It can be slightly off due to leap seconds. https://unix.stackexchange.com/questions/327361/openbsd-6-0-ntpctl-says-clocked-

• amptorn 9y ago
  A leap second coming between now and Unix time 1500000000 would certainly be unexpected. I doubt any software in the world is ready for that.
  • evv 9y ago
    Really, your organization isn't prepared to handle an emergency leap second? Tsk, tsk.. /s