11 November is known as Armistice Day or Remembrance Day.
During the First World War, on the 11th hour of the 11th day of the 11th month in 1918, the guns of the Western Front fell silent after more than four years of continuous warfare.
In many parts of the world, people observe a two-minute of silence at 11 am on 11 November.
Remembrance Sunday is the second Sunday in November, the Sunday nearest to 11 November. Remembrance Sunday sees special events and services relating to remembrance.
Remembrance Sunday is on 13 November 2011.
There will be various concerts, church services and events in London to mark Remembrance Day.
For details of Remembrance Church services, visit www.britishlegion.org.uk/remembrance-in-london
Here are some other London Remembrance event highlights: