Christmas decorations are typically put up around the holiday season, which typically falls between late November and December. The exact timing can vary depending on personal preference, but it's generally considered too early to put up decorations before Halloween. However, if you're feeling particularly festive, there's no harm in getting a head start on the holiday spirit! Just be mindful of your neighbors and make sure to take down any decorations before the end of the season to avoid any conflicts or complaints.