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But why not just ride the efforts of others that have done the studies year after year. Look at big retailers in the real world. It seems every year in October I hear people bemoan the fact that christmas decorations are already going up in stores and malls everywhere. They're doing that for a reason. Black Friday is the peak. Holiday messaging starts weeks prior to that.
Please do the world a favour and don't start talking about Christmas until the beginning of December.
Yeah, I'll do that as soon as people don't start buying till the beginning of Dec.
Ideally, you should start prepping for Xmas in January. ;) But Sept sees a slight incline, with a greater one one in Oct, and a full tilt peak November through December, then there is a heavy business in January as people spend gift certificates and buy themselves what they did not get as gift in Dec.