The quartodeciman controversy

[Secret Alias]

That's part of it Andrew but it is strange that no one can even agree on the proper date. The Montanists vs March 25 or 27th

[Peter Kirby]

Origen seems to place the death of Jesus in AD 28/29... that is, if he puts the destruction of Jerusalem in AD 70.

http://www.newadvent.org/fathers/04164.htm

For forty and two years, I think, after the date of the crucifixion of Jesus, did the destruction of Jerusalem take place.

It's possible that AD 27 or 30 are meant... depending on what we assume about Origen's date of the destruction and the relative reference.

[Tenorikuma]

Random data points: Epiphanius put the death of Jesus in Tiberius 18, i.e. 32 CE. Jerome put it in 30 CE. The Epistula Apostolorum dates the crucifixion to the reign of Herod Archelaus.