The Book of Jubilees (c. 100 BC) and Seder Olam Rabbah (c. 160 AD) date the Passover event referenced in Exodus chapter 12 to 1440 BC and 1402 BC respectively.

Secular historians (Apion, Ctesias, Diodorus, Herodotus, Manetho, Ptolemy of Medes) and early church writers (Africanus, Hippolytus, Clement of Rome, Tatian, Theophilus) were able to calculate nearly identical estimates within a range of 1570-1550 by studying Old Testament chronology.