Time

Time is a measurement of the relative speed of reality within space.

How to manage Time
Keep a schedule, or do some funky stuff near the speed of light. Please do not try to send notes to the past. It will not change your timeline, but you might make a dead person angry. If you decide to make holes in spacetime, please stitch them back up. If you find a hole, please step around it (or jump in if you feel adventurous).

"A stitch in time saves nine."

--Ben Franklin