Monday, Sep. 1: Federal holiday. Government offices, schools and many businesses closed. Labor Day was first celebrated in 1882 to honor American workers.

Thursday, Friday, at 11 a.m. Aug. 28 and 29 and Saturday, Sunday at 11:30 and 1:30 p.m., Aug. 30 and 31 (rain or shine):

Steelworkers Archives’ Walking Tours. Former steelworkers or guides trained by steelworkers lead sidewalk and Hoover-Mason Trestle tours through the Bethlehem Steel plant site. Partners: National Museum of Industrial History. Purchase tickets at steelstacks.org/event/13703/steelworkers-archives-walking-tours/ or in lobby at NMIH, 602 E. Second St. Private group tours available.

Steel produced by Bethlehem Steel was used in some of American’s greatest landmarks, including the Golden Gate Bridge and the Chrysler Building. Discover the history and importance of this 20th century giant; its humble beginnings, its monumental growth and its tragic decline on this walking tour. Bethlehem Visitor Center at SteelStacks presented by Lehigh Valley Health Network. 711 E. First St. Information and tickets: steelstacks.org/event/15378/the-rise-and-fall-of-bethlehem-steel-tour/; walking tours combo packages available.

Sunday, Aug. 31: Lehigh Valley Labor Council Labor Day Picnic. American Club, 300 Cherry St., Coplay. Noon to 5 p.m. For tickets and information, email potterfb@msn.com