DENVER — Labor Day, a federal holiday honoring the U.S. labor movement and the achievements of American workers, is here once again.
The holiday with activist roots, observed on the first Monday of September, creates a three-day weekend marking the unofficial end of summer — if the pumpkin spiced lattes and back-to-school shopping hadn’t already set the tone.
Unlike other federal holidays, like Thanksgiving and Christmas, most stores and major retailers will remain open or have adjusted hours Labor Day…