Overview

• Argentina’s Servicio de Hidrografía Naval confirms the September equinox for Monday 22 at 15:19 Hora Oficial (18:19 UTC), which marks the formal start of spring there.
• In Spain, the autumn equinox occurs Monday 22 at 20:19 peninsular time, ushering in the new season.
• In the United States, the equinox is reported at 2:19 p.m. ET on 22 September, per The Old Farmer’s Almanac, reflecting NASA’s definition of the event.
• Health experts note short‑term adjustment symptoms often called astenia primaveral and advise morning light exposure, steady routines, a balanced diet and gradual exercise.
• Clocks in Spain and the rest of the EU are set to move back one hour on 26 October, with no final EU decision to end seasonal changes yet, while the U.S. returns to standard time on 2 November.