Although traditionally celebrated at Christmas, Jesus Christ's actual birthday remains unknown, as of 2015. Some scholars speculate that Jesus was born in the spring, whereas many astronomers put the date between June and September.
Luke's account of Jesus' birth says shepherds were watching their flocks outside at night. Scholars argue this was likely in spring or summer as flocks would shelter indoors in the winter months.
In 2008, astronomer David Reneke suggested Jesus' birthday was June 17, 2 B.C., according to accounts of the Star of Bethlehem and its correlation to planetary positions on that date.
Some theologians believe Jesus was born in late September based on historical calculations of John the Baptist's conception.