Capital City:
name: London
geographic coordinates: 51 30 N, 0 05 W
time difference: UTC 0 (5 hours ahead of Washington, DC, during Standard Time)
daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October
time zone note: the time statements apply to the United Kingdom proper, not to its crown dependencies or overseas territories
etymology: the name derives from the Roman settlement of Londinium, established on the current site of London around A.D. 43; the original meaning of the name is uncertain
Definition:
This entry gives the name of the seat of government, its geographic coordinates, the time difference relative to Coordinated Universal Time (UTC) and the time observed in Washington, DC, and, if applicable, information on daylight saving time (DST). Where appropriate, a special time zone note has been added to highlight those countries that have multiple time zones. Finally, etymology explains how the capital acquired its name.
Source: CIA World Factbook