The second weekend in November is usually the start of the Christmas season at Disneyland Paris. From this date, the entire resort is transformed into a winter Christmas wonderland. Christmas trees spring up everywhere, the music gets extra atmospheric, Disney characters wear their pretty festive robes and Santa Claus awaits you for a meeting.
If you like Christmas like in the USA, i.e. you are open to a bit of kitsch and pomp, then this is exactly the right time for you to visit Disneyland Paris.
The time around 20 November is particularly recommended if you want to feel the Christmas magic but don't want to be overwhelmed by crowds.
Are you there in the first few days of the month? Then you'll still get to see a bit of Hallowen, because this season usually lasts until around 3 November. After that, the season switches to Christmas in no time at all.