"The US National Counterterrorism Center presents the 2010 edition of the Counterterrorism (CT) Calendar. This edition, like others since the Calendar was first published in daily planner format in 2003, contains many features across the full range of terrorism-related topics: terrorist groups, wanted terrorists, and technical pages on various threat-related issues. The Calendar marks dates according to the Gregorian and Islamic calendars, and contains significant dates in terrorism history as well as dates that terrorists may believe are important if planning attacks to commemorate particular events. The CT Calendar is designed as a ready reference guide for law-enforcement, intelligence, military and security personnel, contingency planners, or simply citizens concerned by terrorist threats. The CT Calendar is oriented primarily to readers in the United States, but we hope it will also be useful for citizens of other countries."
U.S. National Counterterrorism Center: http://www.nctc.gov/