Hijri year (English Wikipedia)

P. Kenneth Seidelmann, ed. (1992). Explanatory Supplement to the Astronomical Almanac. p. 577. For convenience, it is common to speak of a lunar year of twelve synodic months, or 354.36707 days. (which gives a mean synodic month as 29.53059 days or 29 days 12 hours 44 minutes and 3 seconds)

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Clark, Malcolm (2013). Islam for dummies. Hoboken, N.J.: John Wiley & Sons. p. 489. ISBN 978-1118053966.
Hodgson, Marshall G. S. (1977). The venture of Islam conscience and history in a world civilization. Chicago: University of Chicago Press. p. 21. ISBN 0226346862.

"Islamic and Christian Dating Systems". Archived from the original on 2017-02-03. Retrieved 2015-10-11.

"Visibility of Muharram Crescent 1430 AH". Islamic Crescents' Observation Project. Archived from the original on 2021-02-23. Retrieved 2018-12-21.

Aisha El-Awady (2002-06-11). "Ramadan and the Lunar Calendar". Islamonline.net. Archived from the original on 2006-12-14. Retrieved 2006-12-16.

Registration locations, Government of Sharjah, archived from the original on 2 February 2017, retrieved 21 January 2017.

The Beginning of Hijri calendar Archived 2019-01-01 at the Wayback Machine – Paul Lunde, Saudi Aramco World Magazine (November/December 2005), retrieved 1/1/2019

Thomann, Johannes. "Islamischer Kalender". Universität Zurich Universität Zürich Asien-Orient-Institut. Archived from the original on 10 June 2023. Retrieved 11 April 2023.

Registration locations, Government of Sharjah, archived from the original on 2 February 2017, retrieved 21 January 2017.
Thomann, Johannes. "Islamischer Kalender". Universität Zurich Universität Zürich Asien-Orient-Institut. Archived from the original on 10 June 2023. Retrieved 11 April 2023.
Aisha El-Awady (2002-06-11). "Ramadan and the Lunar Calendar". Islamonline.net. Archived from the original on 2006-12-14. Retrieved 2006-12-16.
Hakim Muhammad Said (1981). "The History of the Islamic Calendar in the Light of the Hijra". Ahlul Bayt Digital Islamic Library Project. Archived from the original on 2011-06-10. Retrieved 2006-12-16.
The Beginning of Hijri calendar Archived 2019-01-01 at the Wayback Machine – Paul Lunde, Saudi Aramco World Magazine (November/December 2005), retrieved 1/1/2019
Umar bin Al-Khattab (2002). "Islamic Actions and Social Mandates: The Hijri Calendar". witness-pioneer.org. Archived from the original on 2018-08-19. Retrieved 2006-12-16.
"Islamic and Christian Dating Systems". Archived from the original on 2017-02-03. Retrieved 2015-10-11.
"Islamic New year to be observed on 11th January". AAJ News. Aaj.tv. 2008-01-10. Archived from the original on 2018-12-22. Retrieved 2013-05-22.
"Visibility of Muharram Crescent 1430 AH". Islamic Crescents' Observation Project. Archived from the original on 2021-02-23. Retrieved 2018-12-21.

Chisholm, Hugh, ed. (1911). "Hejira" . Encyclopædia Britannica. Vol. 13 (11th ed.). Cambridge University Press. p. 218.

Umar bin Al-Khattab (2002). "Islamic Actions and Social Mandates: The Hijri Calendar". witness-pioneer.org. Archived from the original on 2018-08-19. Retrieved 2006-12-16.