In this scene they raise their glasses in a toast. Here is the origin of that practice.
The 1995 International Handbook on Alcohol and Culturesays: “Toasting . . . is probably a secular vestige of ancient sacrificial libations in which a sacred liquid was offered to the gods . . . in exchange for a wish, a prayer summarized in the words ‘long life!’ or ‘to your health!’”
True, many people may not consciously view toasting as a religious or superstitious gesture. Still, the custom of lifting wine glasses heavenward might be viewed as a request to “heaven”—a superhuman force—for a blessing in a way that does not accord with that outlined in the Scriptures.
It is more likely that Jesus was born in Sept.-Oct. The month and day of Jesus' birthday is unknown. However, we can be fairly certain that it was not DEC-25.
THE SHEPHERDS:
Luke 2:8 mentions that shepherds were living in their fields keeping watch over their flocks during the nighttime (and, one would assume, also during the daytime.) This is a good indication that Jesus' birth did not happen in December when the flocks would have already have been moved from the fields into pens. They were only in the fields during the warmer months. There is a remark in the Talmud that flocks were put out to grass in March and brought in during the beginning of November. During the Jewish month of Heshvan (our October/November) the fall rains hit and the animals are penned up. At best, the passage narrows down the birth month to one of 7 months in the late spring, summer, or early fall.
Three indicators from the Bible that Jesus was born during the month of Tishri (September/October).
The month of Jesus birth can actually be calculated with reference to the conception of John the Baptist:
Luke 1:5 says that John's father, Zacharias, was "a member of the Abijah division of the Temple service corps." (Living Bible)
1 Chronicles 24:15 assigned the priests of the Abijah division to begin temple service at the start of the 9th week of the year. But at the end of the week, Pentecost had begun, so he would have remained on duty until the end of the 10th week.
Luke 1:23-24 records that Zacharias returned immediately to his home, and that John was conceived shortly thereafter - probably during the last half of Sivan, the 3rd month in the Jewish calendar. Allowing for a normal 9 months pregnancy, John would have been born in the springtime.
Luke 1:36 records that the angel came to Mary when John's mother Elizabeth was 6 months pregnant.
Luke 1:31reports that Mary conceived very shortly after the angel's visit.
Assuming a normal, 9 month pregnancy, Jesus would have been born about 6 months after John - sometime in the fall of the year.