“We have all enjoyed those summer evenings with seemingly endless dusks,” said David Neubauer, an associate professor of psychiatry and behavioral sciences at Johns Hopkins University. But daylight saving time “does not ‘save’ evening light at all, it simply steals it from the morning when it is necessary to maintain our healthy biological rhythms.”
Although the AASM noted that chronic effects of permanent daylight saving time have not been well studied, it highlighted some research that found “the body clock does not adjust to DST even after several months,” which could result in a permanent discrepancy between the environmental clock and the body clock.
“The circadian clock, it’s not just something that involves the cells of your brain,” Cheng said. “The circadian clock also regulates rhythms in other areas of the body — like cells of the heart, like cells of the liver — and by altering our natural circadian rhythm in this way, we’re throwing off that biological rhythm, and that’s a longer term effect.”