https://www.techradar.com/news/the-best-labor-day-sales-2018

While technically the last of day of summer is September 22, for many the season ends on Labor Day. Symbolically, the three-day weekend is summer's last hurrah, and as with any holiday weekend, it is marked by Labor Day sales. As you might expect, it is a great time to get deals on seasonal items as stores make one last big shove to clear out the shelves. Expect dramatic discounts on everything summer-related, but you will see the biggest price drops on summer clothing. You can expect deals from such retailers as:

Otherwise, expect discounts on patio furniture and grills. Indeed, it's the best time of the year to buy a grill, with retailers like Lowe's and Ace Hardware offering more than half-off list prices. It's also a good time to replace your mattress if you need to do so. If last year is any indication, expect stores like Walmart and Sears to take up to 60% of their stock of mattresses. And as this is the last big shopping weekend for some time, don't expect to see sales like these again until Black Friday.