The Royal Observatory Greenwich is the home of Greenwich Mean Time (GMT). But what is GMT and why is it so important?
What does GMT mean?
What does GMT stand for?
How did Greenwich Mean Time begin?
GMT and the quest for longitude
How did railways lead to GMT becoming the UK time standard?
How did Greenwich Mean Time become the international standard?
The first clock to show GMT to the public
Visit the home of GMT
The historic Royal Observatory is the home of Greenwich Mean Time. Enter the Meridian Courtyard to get your essential photo standing on the Meridian Line and explore some of the oldest parts of the site including the Astronomer Royal's house.
The Royal Observatory is open daily, 10am-5pm.