Reporting Dates for Federal Election Commission.
The recently added "Looking Ahead to 2012" section previews many of the 2012 reporting deadlines including, the Congressional pre-primary reporting deadlines, electioneering communications, coordinated communications and federal election activity periods, as well as the 48- and 24-hour reporting periods for independent expenditures.
http://www.fec.gov/info/report_dates.shtml