NTP timestamp right?

[Beno]

Philip has a helpful post here;

Calculate elapsed time (or countdown to future time)

This is an epoch problem. (Hopefully you will catch the humor in that) Opto has a command to give you an NTP timestamp - the UUID version 1 algorithm has its own kind of timestamp (UUID timestamp). NTP timestamp is a 64 bit value - top 32 bits are seconds since 01 January 1900 (called the NTP epoch) and the lower 32 bits are in fractional seconds (they will run through the entire 32 bit number space every second - yikes). UUID timestamps are 100ns intervals since 15 October 1582 (UUID epoch …

(Are you using a 64 bit int for the timestamp?)