My unscientific observation is......for major retailers (WalMart/Target/Dollar stores, Back to School needs to be cleaned out before Halloween is setup. So it depends on when schools go back in session. Here in Jersey its after Labor Day, so the back to school lingers into the second week of September. On HF, some other parts of the country, school starts earlier and thus so does Halloween! I believe the none back to school retailers, Lowes/HD/Pharmacies etc, try to be in the same time or a little earlier than the back to school retailers in their region. That said, saw the first "Halloween City" banner up this weekend! For me that is the first sign of Halloween season!!