Yahalom is the author of numerous books and articles on Hebrew poetry, from Byzantine Palestine (5th century CE) to the early modern period. Much of his work explores the connections between Hebrew poetry and the literature of the other groups living in the same time and place, for example, the link between piyyut and Syriac and Greek Christian hymns; between Hebrew poetry from Spain and the emerging romances in European languages; and between early modern mystical Hebrew poetry in the Ottoman Empire and Turkish songs. He also has written extensively about the bilingual (Hebrew and Arabic) culture of Judah Al-Harizi.
Given this paragraph about Yahalom and his works, tell me when he was born?
Based off of this paragraph, it is clear that Yahalom wrote books and articles "from Byzantine Palestine (5th century CE) to the early modern period". Therefore, it is likely that Yahalom was born in the early modern period or sometime after the early modern period.

The exact date of Yahalom's birth cannot be determined given the provided information.