Eastern European Summer Time

Eastern European Summer Time (EEST) is one of the names of UTC+3 time zone. This zone is 3 hours ahead of Coordinated Universal Time. It is used as a summer daylight saving time in some European, North African, and Middle Eastern countries. During the winter, the Eastern European Time (UTC+2) is used.
Usage.
The following countries and territories use Eastern European Summer Time during the summer:
In 1991 EEST was used also in Moscow and Samara time zones of Russia.