Please will someone explain why Christ's birth would have taken place in spring? I've seen the statement before, but not the explanation as to why it should have been in the spring.
Most Christians are aware that the early Church chose to celebrate the birth of Christ at mid-winter in order to prevent new converts in Rome continuing to celebrate Saturnalia. In other mission fields, Britain, Germany, Scandinavia the winter solstice was celebrated, so again celebrating the birth of Christ then made sense, mission-wise.