> Do we humans have plans in the pipeline for a universal time standard we can use wherever we are? Astronomy generally uses "Julian days" or "Julian years" wh

> Do we humans have plans in the pipeline for a universal time standard we can use wherever we are? Astronomy generally uses "Julian days" or "Julian years" which are measured in seconds since a certain calendar date. Since they're based on SI seconds intervals are independent of the Earth's movement and leap seconds and all that nonsense. Most popular epoch is J2000: measured since noon on 1 January 2000. Mars landers each track local solar time separately and a colony is likely to invent its own timezone with 24 hours and 39 minute days. You need this so that notions like "sunrise" and "sunset" make sense.