His birthday was around the beginning of October, 2 B.C.E...
Date of the celebration...
M’Clintock and Strong’s Cyclopædia says: “The observance of Christmas is not of divine appointment, nor is it of N[ew] T[estament] origin. The day of Christ’s birth cannot be ascertained from the N[ew] T[estament], or, indeed, from any other source.”—(New York, 1871), Vol. II, p. 276.
Luke 2:8-11 shows that shepherds were in the fields at night at the time of Jesus’ birth. The book Daily Life in the Time of Jesus states: “The flocks . . . passed the winter under cover; and from this alone it may be seen that the traditional date for Christmas, in the winter, is unlikely to be right, since the Gospel says that the shepherds were in the fields.”—(New York, 1962), Henri Daniel-Rops, p. 228.
The Encyclopedia Americana informs us: “The reason for establishing December 25 as Christmas is somewhat obscure, but it is usually held that the day was chosen to correspond to pagan festivals that took place around the time of the winter solstice, when the days begin to lengthen, to celebrate the ‘rebirth of the sun.’ . . . The Roman Saturnalia (a festival dedicated to Saturn, the god of agriculture, and to the renewed power of the sun), also took place at this time, and some Christmas customs are thought to be rooted in this ancient pagan celebration.”—(1977), Vol. 6, p. 666.
The New Catholic Encyclopedia acknowledges: “The date of Christ’s birth is not known. The Gospels indicate neither the day nor the month . . . According to the hypothesis suggested by H. Usener . . . and accepted by most scholars today, the birth of Christ was assigned the date of the winter solstice (December 25 in the Julian calendar, January 6 in the Egyptian), because on this day, as the sun began its return to northern skies, the pagan devotees of Mithra celebrated the dies natalis Solis Invicti (birthday of the invincible sun). On Dec. 25, 274, Aurelian had proclaimed the sun-god principal patron of the empire and dedicated a temple to him in the Campus Martius. Christmas originated at a time when the cult of the sun was particularly strong at Rome.”—(1967), Vol. III, p. 656.