Bloomberg.com: Economic Calendar
Provides 2007 economic calendar. Eastern Time [ET]
http://www.bloomberg.com/markets/ecalendar/index.html

Briefing.com: Economic Calendar
Calendar of the next month key events with consensus data.
http://www.briefing.com/Investor/Public/Calendars/EconomicCalendar.htm

Chicago Board of Trade - Event Calendar
List of current US and global events for the upcoming year.
http://www.cbot.com/cbot/calendar/month

Forex Calendar @ Forex Factory
This week's calendar with detailed forecast and previous data.
http://www.forexfactory.com/calendar.php

Forex Fisherman - Economic Calendar
Calendar with forecast, previous period, and volatility.
http://www.fxfisherman.com/forex/economic-calendar/

Monthly Calendar offered by Oanda.com
Detailed monthly calendar of release data events. Downloadable in pdf format.
http://fxtrade.oanda.com/resources/economic_calendar/ec.pdf