Art. 2. Annual Communication.
"This Grand Lodge shall meet in Annual Communication in the City of Waco at 1:30 p.m. on the Thursday before the first Friday of December each year, unless the Grand Master and the majority of the Grand Lodge Trustees consider and declare the Grand Lodge shall meet in Grand Annual Communication in another designated location at 1:30 p.m. on the Thursday before the first Friday of that December, however, no business requiring reports of Committees, balloting or voting by the membership of Grand Lodge shall be conducted until the Grand Lodge is called to labor at 9:00 a.m. on the first Friday of that December..." (italics mine)
As you can see, the Thursday afternoon session is entirely ceremonial. The business of the Grand Lodge is taken up beginning at 0900 Friday morning, and generally concluded around 1200 or so Saturday. The new Grand Lodge officers are installed after lunch Saturday afternoon. This year, the Annual Communication will begin on Thursday, December 1st, and conclude on Saturday, December 3rd.