I have to say this is stupidly early, when there’s halloween shite to deal with first
The Christmas stuff always comes out before Halloween stuff. It’s not because people necessarily start buying for Christmas early. It’s just because there’s a supermarket aisle ‘zone’ for seasonal goods. In the spring and summer they come in quite quick succession Valentines, Easter, Summer/garden/BBQ, Back to school. Once the summer is by theres not really any seasonal stuff to put out until halloween and Christmas and halloween only has a relatively short build up. So the Christmas stuff is generally just there instead of having empty shelves and a lot of it (quality street etc) is gifty/treaty without actually being specifically festive so theres a chance bits of it might sell. But it’s not there because the shop expects people to start buying it right now.
If your bothered about Christmas stuff coming out early we need to beatify someone cool that everyone would like to celebrate with a feast in late September, September’s a bit of feast-day desert currently
There could be secular celebrations maybe. Yesterday was ‘Random Acts of Kindness Day’ in New Zealand, theres Nathonal Steak Au Poivre day in the US next week, we could campaign for that to be a global celebration. September is also ‘Gynecological Cancer Awareness Month’.