Flag and currency designed for a speculative nation where you can go back to a certain moment of life and experience it again, or change a certain fact/decision and experience what an alternative life would be like. It’s about experience and won’t change the reality when you come back.
Time-travel gates will be distributed around the world, everyone can join the nation by crossing the gate near them. In the nation there will be tons of isolated floating rooms with time-travel machines inside. Then you pay the time currency (calculated by time span you spent virtually). A year while time-travelling equals an hour in reality.