There is only ONE time that is saved. This is done in the same moment when a server starts up. Lets say a server restarted 6 PM. Now new players join and the time begins 6 PM. But the server time does not change until you restart it again. That means that for first-time joiners the time moves like normal. But lets they after 4 hours (10PM) ppl can join and its 6 PM again for them. Servers need to be restarted. I played on EU9 and they restart every 6 hours :P The time is just not synced. PS: If you find grammaticals errors, sorry, I'm German :P