EST to GMT Converter

The current offset between Eastern Time (ET) and Greenwich Mean Time (GMT) is shown above the side-by-side clocks. Note that this offset can change twice a year if either zone observes daylight saving time — the converter automatically applies the current DST status to both, so the displayed difference is always accurate for "right now."

Yes. Both clocks use IANA tzdata under the hood, which includes historical and current DST rules for Eastern Time (ET) and Greenwich Mean Time (GMT). When either zone springs forward or falls back, the converter updates without any manual setting. Around the DST transition window, the displayed offset can shift by an hour over a 1-2 week period if only one of the two zones changes its clock.

Yes — the side-by-side display lets you read off any source time and immediately see the destination equivalent. For meeting planning across Eastern Time (ET) and Greenwich Mean Time (GMT), also consider working hours: a 9 AM-5 PM overlap window may be small or non-existent depending on the offset. Tools like worldtimebuddy fill that role specifically; this page gives the precise instantaneous offset.

When one zone enters DST and the other has not yet (or has already exited), the offset between them temporarily shifts by an hour. For US-EU pairs, this happens twice a year — the EU spring transition is in late March, the US transition is in mid-March, creating a 2-week window with a different offset. The converter reflects this exactly.