Labor Day
The US holiday on the first Monday of September, widely treated as summer's last weekend.
Labor Day is a United States federal holiday on the first Monday of September. While its official purpose honors the labor movement, culturally it functions as the unofficial end of summer, bookending the season that Memorial Day opened in late May.
Many pools, seasonal attractions, and outdoor venues close right after Labor Day weekend, which makes it a natural deadline for a summer bucket list. If items are still unchecked, the Labor Day weekend is the last easy chance to knock them out.