@catgirlQueer @vashti As I myself wrote, years ago,
"At nanosecond resolution (if I've done my arithmetic right), 128 bits will represent a span of 1 x 10²² years, or much longer than from the big bang to the estimated date of fuel exhaustion of all stars. So I think I'll arbitrarily set an epoch 14Bn years before the UNIX epoch and go with that. The time will be unsigned - there is no time before the big bang."
So, yes, if you're content with nanosecond resolution...
https://github.com/simon-brooke/post-scarcity/wiki/cons-space#time