The server time, is the time in Germany (CET or CGEST), which is one hour ahead of GMT in winter, and two hours ahead in summer; the clocks change on the last sundays in March and October. It's 6 hours ahead of the USA's EST time zone, except for the last week in March (When daylight saving time kicks in CET, but won't start for another week in EST). This sever time is used to establish times of trades, combined attacks and game updates. The game updates take place at 00:05, 08:05, 16:05 server time.