This line has been called the Greenwich Meridian since 1884, and it is from here that all terrestrial longitudes are measured and the world's time zones are calculated. Generally, if you are in a ...

The clocks go forward on Sunday, marking the beginning of British Summer Time (BST). This marks the end of Greenwich Mean Time (GMT) and will mean longer, lighter evenings from next week.

In order to keep time accurately, we have always had to set our clocks by the ticks of a better one. Until the 1950s, the best were those set by astronomers based on the position of the sun in the sky ...