In the Seasons Pack, I like to create holidays and experiment with a lot of the events on the Calendar. I also like to edit some of the existing Holidays. For example, I remove the themed decoration from all the holidays because they are less than fulfilling. I will add other events to the holidays to fill in for that.
For Thanksgiving, I added the Attend a Holiday Ceremony event instead of the Holiday Decorations. This one was confusing as it is not really clear how to attend. It took several times before I figured out how to attend a holiday ceremony. The event shows on the list as two hands clasped together.
To attend the ceremony, click on the phone and select the car for Travel. At the top of the options, there would be "Attend Holiday Ceremony..."
At the point, the Sim will get up and walk to the front of the house and vanish, similar to when a Sim goes to work. There will be the usual Sims timer around the face of the Sim in the lower left corner while the Sim is off attending the ceremony. Some call this "going down the Sims Rabbit Hole" because we have no clue what is actually going on.
After the Sim returns, there will be a moodlet that shows up, explaining how the ceremony went, and that is that.
