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INFORMATION TO COME

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Content Notes

Spelling of arabic names and terms

While there is no universally accepted transliteration of Arabic names and terms, this edition of the Counterterrorism Calendar adheres to a transliteration system that is generally used throughout the US Government. In this system, the letters “u” and “a” are preferred over “o” and “e.” For example, the name of the al-Qa‘ida operative who was detained on 1 March 2003 is Khalid Shaykh Muhammad, not Khalid Sheikh Mohammed; he was an associate of Usama Bin Ladin, not Osama Bin Laden. We have retained, however, the spellings used on the Rewards for Justice and FBI terrorism sites; spellings there are designed for easy recognition or are used in legal documents and therefore do not always conform to these rules.

Islamic calendar

The Islamic calendar is based on the movement and observation of the moon. The Islamic year contains 12 months, none of which can exceed 30 days. Each month starts when the lunar crescent is first seen after a new moon. Because 12 lunar months multiplied by 29.53 days equals 354.36 days, the Islamic calendar will always be approximately 11 days shorter than the Western (Gregorian) calendar. For example, 1 Muharram, the first day of Islamic year 1437 (known in the West by the Latin term Anno Hegirae, or A.H.), fell on 14 October 2015; in A.H. 1438, 1 Muharram falls on 2 October 2016. Because of lunar observation and differences in time zones, the observance of Islamic holidays and calendar dates may vary from region to region. Islamic dates and holidays are approximate, as they are determined by local lunar observation. Islamic and Jewish holidays begin the evening preceding the date shown unless stated otherwise.

Map boundaries

Boundary representation is not necessarily authoritative.

The information on this website is valid as of 29 August 2015. This website contains only information in the public domain that has been verified and disseminated by US Government sources.