Labor Day 2025 September 1, 2025 News PHI will be closed on Monday, September 1, 2025, in celebration of Labor Day. As an enduring American manufacturer, it is an honor to recognize the valuable contributions of our workers to our business and society. Tags: 2025, American Made, employee, holiday, labor, Labor Day, Made in America, Made in the U.S.A., manufacturer, manufacturing, precision, pride, work, workers