Some things don't really change. A 62-gun salute from the Tower of London and a 41-gun salute from Green Park, near Buckingham Palace, will welcome the baby into the world with a bang, just as it did when previous royals were born. If the baby is born on a weekday, the salute will be mounted within six hours; if it's a weekend birth, the salute will wait until Monday, the Ministry of Defense says.

AP Photo
A mask depicting Britain's Duchess of Cambridge and clocks showing New York and London time, which were placed by members of the media, are seen across St. Mary's Hospital exclusive Lindo Wing in London, July 21.