Time systems, calendar references, and timezone tools.

Time-zone reference

GMT

GMT is the historical mean-solar reference associated with Greenwich and still used as a common comparison point.

What this abbreviation usually means

This page clarifies where GMT overlaps with UTC and where everyday usage starts to blur the distinction.

Reference offset

GMT is commonly associated with UTC+0. The current IANA reference on this page resolves to UTC right now.

Representative locations

Greenwich, Accra, Reykjavik are the places most readers expect when they search for this abbreviation.

DST handling

This zone is typically treated as a fixed year-round reference without a daylight-saving jump.

Best next step

Use the dedicated converter when you need to translate a specific meeting or timestamp between this zone and another one.

Compare GMT with related zones

These are the abbreviations people most often compare against this reference.

UTC Open the UTC reference page and compare it directly with GMT. CET Open the CET reference page and compare it directly with GMT. EST Open the EST reference page and compare it directly with GMT. Timezone Converter Convert a specific date and time between GMT and any other major world zone.