Interestingly, the real awareness starts when, after some weeks, one changes such a clock back to the actual time: Then you suddenly have to remember that this

Interestingly, the real awareness starts when, after some weeks, one changes such a clock back to the actual time: Then you suddenly have to remember that this clock does show the correct time, which increases the stress level even more than the previous "10 minutes fast" phase. Not sure if this is a good or bad thing, but an intesting experience nevertheless.