Africa uses six time zones. From West to East the time zones in Africa are Cape Verde Time (UTC/GMT -1), Greenwich Mean Time (UTC/GMT +0), West Africa Time (UTC/GMT +1), Central Africa Time (UTC/GMT +2), East Africa Time (UTC/GMT +3), and Mauritius Time and Seychelles Time, both of which are (UTC/GMT +4.)
South Africa Standard Time (UTC/GMT + 2) is used by South Africa, Lesotho and Swaziland. Eastern European Time (UTC/GMT + 2) is used by Egypt and Central European Time (UTC/GMT + 1) is used by Algeria, Tunisia and Libya.
Daylight Saving Time (DST) is not used in most of Africa. However, the countries of Libya, Morocco, Namibia, and Western Sahara do observe Daylight Saving Time. Tunisia ended the use of daylight saving time in 2009 and Egypt ended the use of daylight saving time in 2011.
Update: On November 10, 2012 Libya changed time zones from UTC/GMT + 2 (Eastern European Time) to UTC/GMT + 1 (Central European Time). This resulted in clocks being turned back by one hour. Libya also announced that effective 2013 it would observe daylight saving time from the last Friday in March through the last Friday in October.