The Burj Khalifa (/ˈbɜːrdʒ kəˈliːfə/; Arabic: برج خليفة, Arabic pronunciation: [bʊrd͡ʒ xaˈliːfa], ‘Khalifa Tower’), known as the Burj Dubai prior to its inauguration in 2010, is a skyscraper in Dubai, United Arab Emirates. With a total height of 829.8 m (2,722 ft, just over half a mile) and a roof height (excluding antenna, but including a 244 m spire) of 828 m (2,717 ft), the Burj Khalifa has been the tallest structure and building in the world since its topping out in 2009, supplanting Taipei 101, the previous holder of that status.
On the higher floors, the sun can still be seen for several minutes after it has set at ground level. This has led Dubai clerics to rule that those living above the 80th floor should wait 2 additional minutes to break their Ramadan fast, and those living above the 150th floor, 3 minutes.