Earth Hour 2013

The worst result was from Calgary, Canada. The city's power consumption actually went up 3.6% at the hour's peak electricity demand. In Calgary, however, where weather plays a large role in power consumption, the city experienced weather 12°C colder than the previous Saturday's recorded temperature.
Celebrations around the world
• The Danish royal palaces, Amalienborg Palace and Gråsten Palace, went dark at the Queen's command.