What you say is true but since it applies to a relatively small percentage of the population the energy savings of year-round DST would be negative. We know th

What you say is true but since it applies to a relatively small percentage of the population the energy savings of year-round DST would be negative. We know this because that is what happened when there was year-round DST, during Jimmy Carter's presidency, as a result of the Arab oil embargo. From an environmental and energy perspective the current DST calendar is nearly ideal.