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The U.S. Botanic Garden (USBG) will offer a gardenwide “Season’s Greenings” holiday display this year, running from Thursday, Nov. 24, through Monday, Jan. 2, 2023, closed Dec. 25. As part of the festivities, G-gauge model trains will run between 10:00 a.m. and 5:00 p.m. each day in the gated outdoor gardens and the Conservatory will feature poinsettias, holiday decor, and D.C. landmarks made from plants.