Sukkot
Commanded in Leviticus 23:33 – 36, Sukkot is called the Feast of Tabernacles, or the Feast of Booths. At the specified time, on the fifteenth day of the seventh month(Hebrew calendar), the Children of Israel would come together and build temporary structures where they would live for seven days. They would not work at their occupations on the first and eighth day (Shemini Azaret/ Simchat Torah)as they celebrated the time of the harvest and offered sacrifices to G-d thanking Him for providing them with their harvest.
Because Sukkot is a time when the people of Israel would have gathered in Jerusalem (a time when a census of the people could have been easily conducted) many believers in Y’shua feel that this would have been the time when Messiah was actually born in Bethlehem.