Dhu'l-Qa'da
11th month of the Islamic calendar

Dhu'l-Qa'da (Arabic: ذُو ٱلْقَعْدَة, Ḏū l-Qaʿda, IPA: [ðu‿l.qaʕ.da]) is the eleventh month in the Islamic calendar. It is one of the four sacred months in Islam during which warfare is prohibited, hence the name "Master of Truces". It could possibly mean "possessor or owner of the sitting and seating place" - the space occupied while sitting or the manner of the sitting, pose or posture.
Transliteration
The most correct and most traditionally widespread pronunciation of the month's name according to the 13th-century Syrian jurist al-Nawawi is Dhu'l-Qa'da. Al-Nawawi also mentioned that a smaller group of linguists allowed the pronunciation Dhu'l-Qi'da, however.
Timing
The Islamic calendar is a lunar calendar, and months begin when the first crescent of a new moon is sighted. Since the Islamic lunar calendar year is 11 to 12 days shorter than the tropical year, Dhu'l-Qa'da migrates throughout the seasons. The estimated start and end dates for Dhu'l-Qa'da, based on the Umm al-Qura calendar of Saudi Arabia, are:
Islamic events
5 AH, the Muslims took part in the Battle of the Trench.
6 AH, Truce of Hudaybiya.
6 AH, Pledge of the Tree.
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This entry incorporates text from “Dhu'l-Qa'da” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.