Hi, I was born and raised in the INC but I converted to the Roman Catholic Church after studying in college. Since hindi naniniwala ang mga INC sa Christmas, ang sagot nila sa greeting mo na "Merry Christmas" mo ay:
"Happy New Year"
"Same to you" o
"Happy Holidays"
Jesus was born on Dec. 25
"Jesus was conceived on March 25, the Christ child would be born nine months later, on December 25."
-- University of Portland News
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Mary conceived on the sixth month.
Luke 1:26-33
"On the sixth month God sent the angel Gabriel to Nazareth, a town in Galilee, To a virgin pledged to be married to a man named Joseph, a descendant of David. The virgin's name was Mary. The angel went to her and said, "Greetings, .... You will be with child and give birth to a son, and you are to give him the name Jesus. He will be great and will be called the Son of the Most High. The Lord God will give him the throne of his father David, And he will reign over the house of Jacob forever; his kingdom will never end."
On the sixth month would then well be "on the sixth month i.e. in the month of Elul" which is also the "sixth month of pregnancy of Elizabeth."
Thus from 23rd Tishri adding 280 days of gestation period we arrive at
(7+30+29+30+29+30+29+30+29+30+3) Tammmuz 3
Adding 6 more months we arrive at Teveth 3 which is exactly December 25th.
Thus the date which we celebrate is indeed the Birthday of Jesus.
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Yes, it's cold in December, but there are shepherds who kept sheeps all year round, even during the cold season, to supply lambs for the daily sacrifice.
"One argument raised against the December date is that there were shepherds keeping watch at night at that time in the field (Luke2:
. December is pretty cold and normally shepherds would not be out there. In fact, early Jewish sources suggest that the sheep around Bethlehem were outside year-round. In the normal traffic of shepherds they move around and come near Bethlehem from November to March of the year. But then these were a special class of shepherds who were Levites who kept the sacrificial lambs. They do not move around because they supply the lambs for daily sacrifice from whom people bought their approved lambs, which are blemishless. The fact that the Angels announced the arrival of the perfect sacrificial lamb to these shepherds indicates this.'
-- Prof. M.M. Ninan
References:
Why is Christmas celebrated on Dec. 25 and how and where did many common Christmas traditions begin?
University of Portland News
https://www.up.edu/?/12/why-christmas-is-on-december-25.htmlWhen was Jesus Born?
by Prof. M.M. Ninan
http://www.talentshare.org/~mm?/articles/christmas/index.htmhttp://www.talentshare.org/~mm9n/articles/hist/christmas.htm 
