The shepherds are not selected for the visitation (2:8–20) because they are sinners but because of their lowly status. The shepherds would take turns watching the flock at night to guard against wolves and thieves. The text does not indicate the time of year, although December would be an unusual time of year to be outside at night. The shepherds are told that the good news is for all the people (2:10), and by this Luke is probably indicating the inc…
Baker Publishing Group, The Baker Illustrated Bible Commentary, by Gary M. Burge