Time Difference from Greenwich to Major World Cities
Visual offset comparison between Greenwich and key financial and international communication centers:
Drag the timeline scrubber to compare local hours across both locations:
Sunrise, Sunset and Solar Day Length in Greenwich
Solar cycle and day length calculated for coordinates 51.4816Β° lat, 0.0Β° lon at an elevation of 43 meters above sea level:
Greenwich Mean Time Timezone Specifications & DST Rules
About the GMT Abbreviation
GMT stands for Greenwich Mean Time. It is observed in United Kingdom (Europe) at UTC +00:00.
Read full GMT time zone guide, meanings & active territories →
Travel, Infrastructure & Business Essentials for Greenwich
Essential practical information for international business travelers, digital nomads, and expats visiting Greenwich:
SE10
Related Cities in the Same Region & Timezone
Major commercial and administrative hubs in neighboring territories sharing direct regional links with Greenwich:
Historical Adoption & Legal Timekeeping Governance
Discover the current local time in Greenwich, the historical home of Greenwich Mean Time (GMT). This comprehensive timezone profile provides detailed information about the Etc/Greenwich timezone, including its UTC offset, daylight saving time (DST) status, and historical context. Greenwich serves as the defining point for the world's time zones, and understanding its timekeeping is crucial for global coordination. This location is a significant historical and cultural landmark, renowned for the Royal Observatory and the Prime Meridian. The timezone does not observe daylight saving time, maintaining GMT throughout the year. Explore the time difference between Greenwich and your location, and learn about the significance of GMT in navigation, astronomy, and international standards. We provide up-to-date information on the timezone's regulations and its impact on daily life in Greenwich and beyond. This profile also includes details about the local infrastructure, demographics, and cultural aspects of Greenwich, making it a valuable resource for travelers, researchers, and anyone interested in global timekeeping. The information is meticulously researched and updated to ensure accuracy and relevance for current international scheduling.
Historical Background: Officially adopted on 1884-02-23. Established as the prime meridian and basis for GMT.
Legal Time Authority:
Regulated by the Royal Observatory, Greenwich
under official statutory decree Greenwich Mean Time Act 1880.
Frequently Asked Questions about Greenwich Time
What is the current local time and timezone in Greenwich?
Greenwich operates on Greenwich Mean Time (abbreviated as GMT). The standard offset is UTC +00:00.
What does GMT timezone stand for?
GMT stands for Greenwich Mean Time. It maintains a standard offset of UTC +00:00 from Coordinated Universal Time (GMT / UTC).
Does Greenwich change clocks for Daylight Saving Time (DST)?
No, Greenwich does not observe Daylight Saving Time. The local time remains constant throughout the entire year at UTC +00:00 without seasonal clock shifts.
What power plug and voltage adapter do I need for Greenwich?
United Kingdom uses plug types G with a standard voltage of 230V at 50Hz.
How can I convert time or schedule calls with Greenwich?
You can use the interactive 24-hour dual-slider converter directly on this page, or visit our Time Difference Tool and Meeting Planner to schedule seamless cross-timezone calls.