Overview
- The clock change will happen in the night between Saturday and Sunday, Oct. 24–25, when clocks move from 3:00 to 2:00 and standard time remains in force until the last weekend of March 2027.
- Shifting the clock alters the circadian system that times melatonin production and can cause temporary symptoms such as daytime sleepiness, early awakenings, irritability and trouble concentrating.
- Most people recover quickly, with sleep and mood disturbances typically resolving in about five days according to sleep medicine specialists.
- A limited study cited by experts found roughly a 4% rise in heart attacks in the week after the switch, a signal that appears to affect mainly older people but that researchers say is small and not definitive.
- Public-health advice to ease the transition includes getting morning natural light, keeping regular sleep and meal schedules, staying physically active, avoiding excess caffeine and sugar, and consulting a doctor before starting supplements or sleep drugs.