https://www.newscientist.com/article/mg24732960-900-inside-the-incredibly-slow-race-to-reinvent-time/
Do we need to recalibrate clocks with the latest scientific timepiece? It seems tyrannical to have to hitch our wagon train to such an exclusive and inaccessible instrument. In any case, Einstein’s a priori assumption that the speed of light is constant prevents that being verified by measurement because no independent clock is available. The notion of universal time seems practically useful but epistemologically unsound. Updating it obfuscates the main issue which is that humans have become obsessed with regulating their narrow affairs by timepieces instead of tuning into each other’s broader personal experiences. I have written a fiction novel Time is Gold which explores time in athletic endurance to be published soon.
http://www.martinknox.com

Time is slower in a faster frame.