Zechariah's "order of his course", [Luke 1:8] and Luke's attempt to write everything in the order that they occurred [Luke 1:3].
Zechariah was of the eighth rotation, so (according to Bible scholars), he would be serving sometime close to middle of our June (the Jewish calendar is different from ours and is made up of 28 day months).
If John was conceived then, it would place him being born 9 months later on or near the Passover feast. {Note: according to Jewish tradition; there is always an empty plate set at the Passover meal for Elijah, Jesus claimed that John was Elijah [Matt. 17:10-13, Luke 1:17]}
Mary finds out of Elisabeth's pregnancy in her 6th month, which probably was the time of Jesus' conception [Luke 1:26-38], this would be in our December, possibly in or around the "Feast of Dedication", (also known as the feast of lights or Hannukah). {Note the references to Jesus, "the Word" and light in John 1:1-14, 8:12}
Now if Jesus was conceived in mid to late December, that would put him being born in or around the "Feast of Tabernacles", in September. {Note the Feast of Tabernacles is where the Jews go and builds a "booth" and communes or dwells with God, compare to John 1:14}
The Christmas Carol Quiz; I noticed one time when I was leading the caroling that most everyone knew the first verse of each carol, but I’d lose half on the second half and everyone thereafter. So here’s the quiz –
I give the first line of the last verse, you name the carol
Move your mouse over the snowflake for the answer
The Kids in Girl and Boy land will have a jublilee
There's a happy feeling nothing in the world can buy, When they pass around the coffee and the pumpkin pie
The fire is slowly dying and my dear, we're still good bye-ing
What a bright time, it's the right time, To rock the night away
Oh, Ho, the mistletoe, up where you can see
What a beautiful sight. Jump in bed cover up your head
Through the years we all will be together, If the Fates allow
Gosh oh gee, how happy I'd be, If I could only whistle (thhh)
Now the ground is white, go it while you're young, Take the girls tonight and sing this sleighing song;
Heedless of the wind and weather;
I've warned all my friends and neighbours, Better watch out for yourselves