Free Forex Calendar

http://www.forexfactory.com/calendar.php

This site contains information about important forex events and release of economic data (actual, forecast, previous) on AUD, CAD，CHF，EUR，GBP，JPY，NZD，and USD. In addition，it rates the impact of each event or release of economic data on foreign exchange: High, medium or low.

http://www.dailyfx.com/calendar/briefing

Dailyfx.com offers prior, forecast and actual economic data in its free forex calendar. For forecast data, it provides data from two sources, Briefing.com and consensus, which provides readers a more balanced view of the forecast.

http://www.todayfx.com/calendar.html

The free forex calendar on this site covers forex events and release of economic data on USD, EUR，GBP，JPY，AUD, CAD，CHF and NZD. There is also an Archive of Previous Economic Indicators.