On Sunday, Nov. 2, 2025, most Americans will set their clocks back one hour as Daylight Saving Time ends.
While the extra hour of rest may seem beneficial, research indicates that the shift can disrupt circadian rhythms, leading to insomnia, fatigue, and decreased concentration for millions of people. While the extra hour of rest may seem beneficial, research indicates that the shift can disrupt circadian rhythms, leading to insomnia, fatigue, and decreased concentration for millions of people.
Studies from the American Academy of Sleep Medicine show that clock changes can increase sleep problems, drowsy driving, and workplace errors, particularly affecting children, teens, and shift workers."Getting enough sleep is not just about total hours. Respecting your body’s natural cycles makes the difference between waking up groggy and feeling refreshed," said the creators of the Sleep Calculator. This free tool suggests optimal bedtimes to ensure users complete the 90-minute sleep cycles recommended by experts. Beyond the clock change, My Sleep Calculator helps users improve rest year-round, promoting healthier routines and greater awareness of sleep’s role in overall wellbeing.
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