- 1500 CE - 1699 CE (3)
- 1700 CE - 1799 CE (2)
- 500 CE - 1499 CE (2)
- 1800 CE - 1849 CE (1)
- 1850 CE - 1899 CE (1)
- Religion (4)
- Islamic calendar
- Astronomy, Arab (3)
- Timekeeping (3)
- Time measurements (2)
- Astronomy (1)
- Astronomy -- Tables (1)
- Astronomy, Medieval (1)
- Seasons (1)
- Zodiac (1)
Seasonal Almanac Based on the Coptic Calendar
The author of this work, Shaykh al-Islām Ahmad al-Bashtakī, lived in Bashtak near central Cairo. The work goes through the 13 months of the Coptic calendar: Tūt (Thout), Bāba (Paopi), Hātūr (Hathur), Koihak (Koiak), Tūba (Tobi), Imshīr (Meshir), Baremhāt (Paremhat), Barmūda (Paremoude), Bashons (Pashons), Bawna or Būna (Paoni), Ibīb (Epip), Misurī (Mesori), and the Days of Nasī (ayyām al-nasī; also known as the Little Month, Pi Kogi Enavot, or El Nasii). The work gives the corresponding months in the Roman and Persian calendars, notes the astrological significance of days, and ...
The Book of the Table for the Calculation of the Islamic and Christian Years
The correct reckoning of time has been the object of study by many Arabic scientists. Its importance in Islam has to do with the proper calculation of the length of days, months, and years necessary for the performance of the five daily prayers and for the celebration of festivals at the correct hours, days, and months of the lunar year. This 19th-century copy of a work by Muḥammad ibn ʻAbd al-Laṭīf Thābitī opens with some remarks on the signs of the zodiac, followed by a discussion of the 28 lunar ...
The Book of the Table Regarding the Knowledge of the Time and the Heavens for the Calculation of the Beginning of the Islamic and Christian Months
Because of the religious obligation to perform canonical prayers at set times of the day and the sanctity attributed to particular times of the year, such as the month of Ramaḍān, Muslim scientists have studied questions relating to the calendar and the reckoning of time almost since the beginning of Islam. The present manuscript presents tables for the comparison of the Hijrī and Christian years. Little is known of the author of these tables, al-Ḥusayn ibn Zayd ibn ‘Alī ibn Jaḥḥāf, beyond a marginal note, which states that Ibn Jaḥḥāf ...
The Book of the Delight of the Eye Regarding the Movement of the Two Luminaries
Little is known about the astronomer Muḥammad ibn ʻAbd al-Qādir al-Khalīlī al-Jaʻbarī, who wrote the treatise Kitāb qurrat al-‘ayn and prepared the accompanying astronomical tables preserved in this copy. Some information about the original work can be inferred from information provided on the last page of this manuscript, where the colophon specifies that the copy was produced in the year 932 AH (1525), based on an older, quite damaged manuscript. This information gives us a terminus ante quem (latest possible date) for the original work. The treatise also opens ...
The Lights of the Stars
The present manuscript is a commentary entitled Anwār al-nujūm (The lights of the stars) by an author who appears to have stated his name as Jamist al-Rumi (Jamist the Byzantinian). The work is based on Al-zīj al-jadīd (The new astronomical tabulations) by Alī ibn Ibrāhīm Ibn al-Shāṭir (died 1375), the most-distinguished Muslim astronomer of the 14th century. Ibn al-Shāṭir was active as muwaqqit (timekeeper) at the Umayyad mosque in Damascus, where he constructed a magnificent sundial to adorn the central minaret; it had special curves to measure the times ...