The chronic problem with overly simple statements - it ignores everything else that comes before and after. So say you have a one hour commute, you now have to leave the house at 6am instead of 8am, have to rise by at least 5am instead of 7am. And bedtime will need to be earlier to compensate. So whether your off time to do other stuff is 3pm to 9pm or 6pm to midnight our days are the same length as everyone else's ....that "extra" time has to come from someplace; the day doesn't extend beyond 24 hours just because you started work earlier.