Maybe it would be useful to use a bell curve for the population of a given time zone between say 5am and 11am, with the max around 8am. This would cover late sl

Maybe it would be useful to use a bell curve for the population of a given time zone between say 5am and 11am, with the max around 8am. This would cover late sleepers and early risers (and people like myself who had to travel from one timezone to another for work and haven't adjusted).