Diferencia entre GMT y EST Comparar Greenwich Mean Time (GMT) y Eastern Standard Time (EST) revela desfases estándar y estacionales. Mientras GMT permanece fijo, Eastern Time cambia a EDT durante el horario de verano.
Comparación de zonas horarias
Greenwich Mean Time (GMT) is a fixed reference at UTC+0. Eastern Time is a seasonal civil time zone: it uses Eastern Standard Time (EST, UTC−5) in winter and Eastern Daylight Time (EDT, UTC−4) during daylight saving time.
GMT developed from observations at the Royal Observatory in Greenwich, founded in 1675. At the 1884 International Meridian Conference, delegates selected the Greenwich meridian as the world’s prime meridian. In North America, railroads introduced standardized regional time in 1883, and the U.S. Standard Time Act of 1918 formally recognized the Eastern time zone and established national daylight saving rules.
GMT stays fixed while the Eastern offset changes when daylight saving time begins and ends.
| Period | Eastern Label | UTC Offset | Hours Behind GMT |
|---|---|---|---|
| Early Nov – Mid Mar (Winter) | EST | UTC−5 | 5 hours |
| Mid Mar – Early Nov (Summer) | EDT | UTC−4 | 4 hours |
| DST Transition (Spring) | EST → EDT | Clocks spring forward 1 hour | Changes from 5 to 4 |
| DST Transition (Fall) | EDT → EST | Clocks fall back 1 hour | Changes from 4 to 5 |
These dates apply in U.S. locations that observe Eastern Time and daylight saving time.
Sí, GMT siempre está por delante de Eastern Time. Son 5 horas en invierno (EST) y 4 horas en verano (EDT).
Cambia porque Eastern Time observa el horario de verano, mientras que GMT mantiene sus relojes fijos todo el año.
Debe revisar la estación del año. Una reunión a las 3:00 PM GMT es a las 10:00 AM EST en invierno y a las 11:00 AM EDT en verano.
Ciudades principales como Nueva York, Miami, Toronto y Atlanta.
