Labor Day comes first

As an arts and crafts store that is a supplier to the public but also to people in the florist and party planning industry, they will have materials on display months before said holiday.

Were you to have an account at some of the floral suppliers down at the Flower Market section of the city, you would not only be seeing Christmas on display but also those observances just before such as Halloween, and Thanksgiving. You will also see (now) New Years. In a couple of months or so you will start to see Valentines Day stuff. It's usually anywhere from 3-6 months in advance of said observances.

Any side bets on when you will start to see artificial Xmas trees at Home Depot?

These are just the embryos that will mature into actual snow and Santa. That's why they lack color and features. Everything will be fine if you just go to sleep.