What year was the first Passover?
A more controversial claim is that Moses was actually the Egyptian pharaoh Thutmose III (note the similarity of the name Moses and Thutmose) whose reign was 1479 to 1425 BC. If this theory is the case the Exodus never actually happened and the Passover ritual is a remnant of older Egyptian and Mesopotamian rites. So, the first Passover may have occurred centuries later, when the Passover tradition entered Jewish legend.
