This is how you should store time https://cr.yp.to/libtai/tai64.html https://cr.yp.to/libtai/tai64.html . Many events also have a "where" associated with them,

This is how you should store time https://cr.yp.to/libtai/tai64.html https://cr.yp.to/libtai/tai64.html . Many events also have a "where" associated with them, you should store that too. By storing where and when, you can derive lots of other things that are usually conflated with the first two. Like where the sun was in the sky, the direction of the prevailing winds, outside temperature, and whether the local jurisdiction plays games with their clocks twice a year.