Thanksgiving
After viewing my Halloween marathon, I came across a reputable I Love Lucy website that states the 1956 Christmas show was filmed ON Thanksgiving day! What?? The produces couldn't wait and film it Friday? (The show was always filmed Thursday nights, so as to give the cast and company a three-day weekend). I've never before heard about movie or TV stars working ON a legal holiday, unless it's the Macy's day parade!
The site also states the Xmas show was filmed sans an audience, which makes sense, given all the "memory" clips. But, alas, I doubt any studio audience would've laughed much anyway, as this ep is rife with sentiment, but short on humor (past clips excluded).
The site further states that Desi wanted to finish all the apartment shows by the end of the year, strike the set and start fresh with the Conneticut shows by January '57.