How old was Jesus when he died? Why scholars can't agree on an exact age.

Jesus Christ (also known as Jesus of Galilee or Jesus of Nazareth) is the central figure in  Christianity who is seen as the son of God. Important aspects of the Christian canon are the Virgin Birth of Jesus from his mother, Mary, and Jesus’ death, which was the crucifixion.

This brings up the question of how long he lived. Different sources have different death and birth dates. Research concludes it is difficult to find the exact date of Jesus’ death because of differences in the chronology of narratives surrounding his final days.

How old was Jesus when he died?

Jesus was born around 4 B.C. and was crucified in A.D. 30, according to the PBS FRONTLINE show "From Jesus to Christ." Britannica cites his birth year as ranging from 6 to 4 B.C. and has the same death year as Frontline.

In general, Jesus’ age at death is heavily contested by scholars, according to "Dating the Death of Jesus" by Helen Bond and published online by Cambridge University Press in 2013. Some cite Jesus’ death as happening on 14th of Nisan, which would be “Friday April 7th 30 [A.D.] or April 3rd 33,” based on a scholar's timeline preference, but Bond does not subscribe to the specificity of those dates.

Depending on which calendars or accounts of Jesus’ final days people use, it is difficult to find one specific answer on when Jesus died and as a result, how old he was.

However, Bond makes the case Jesus died around Passover, between A.D. 29 and 34. Considering Jesus’ varying chronology, he was 33 to 40 years old at his time of death.

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How old was Mary when Jesus died?

According to Christianity.com, Mary was 46 to 49 years old when Jesus died. Britannica states that she “flourished” from 25 B.C. to A.D. 75. Assuming this is in reference to her lifespan, according to Britannica, Mary was approximately 54 to 59 years old when Jesus died.

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This article originally appeared on USA TODAY: How old was Jesus when he died? Best estimates of age, year he died.