The date of 25 February 1003 comes from the only Arabic source to mention the battle, Ibn al-Faraḍī, who records that Sa‘īd bin Mūsā of Elvira "died in the battle of al-Māša near Balagî the Thursday ten days before the end of the month of Rabī’ al-Thānī in the year 393", that is of the Islamic calendar, being 25 February 1003 in the Anno Domini system.[8] Évariste Lévi-Provençal, the French Orientalist, believed it took place on 27 February, since the Islamic day (20 Rabī’) began at sunset, though 27 February 1003 was not a Thursday.[9]