To convert 7 p.m. Greenwich Mean Time to Eastern Standard Time, subtract five hours from 7 p.m. The result shows that when it is 7 p.m. GMT, it is 2 p.m. EST. Keep in mind that in countries where Daylight Standard Time is used during the summer months, the difference is only four hours while DST is in effect.
- Find the difference between time zones
GMT is five hours ahead of EST.
- Subtract the difference from GMT
To convert the time from GMT to EST, subtract five hours from the time in GMT. Therefore, 7 p.m. – 5 hours = 2 p.m.
- Label the answer with the time zone
Label the answer with the correct time zone; 7 p.m. GMT is the same time as 2 p.m. EST.