I've made a clock with a display made out of trains.
This means you can see the current time from the map too.
main video: • Factorio rail clock
factorio forum post: https://forums.factorio.com/viewtopic... (you can download the map here)
reddit: / factorio_rail_clock_timelapse
blueprint string: https://pastebin.com/wfcrMhsy (you will still need to do some work if you use it like placing the trains,...)