Video from Patheos
"The date of Jesus birth may not seem that important. However, when we think about matters of calendaring, the use of “A.D.” or “B.C.” when we speak of historic events, or even some of the most popular Christian holidays, such as Christmas, it becomes evident that this is a more important question than one might think. Watch the video and learn more about what we DO and DON’T know about when Jesus was born." from video introduction.