Capital City:

name: Cairo

geographic coordinates: 30 03 N, 31 15 E

time difference: UTC+2 (7 hours ahead of Washington, DC, during Standard Time)

daylight saving time: +1hr, begins last Friday in April; ends last Friday in October

etymology: the ancient Egyptian name of the original city was Khere-ohe or Kheri-aha; the modern city's name may also derive from the Arabic al-qahir, meaning "the victorious;" this is an Arabic name for the planet Mars, which was in the ascendant on the day in 969 A.D. when construction on the new part of the city began

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