National Secondhand Wardrobe Day is observed on August 25 and promotes sustainable fashion by encouraging the buying and donating of pre-loved clothing. This day fosters a circular economy, helping individuals reduce their environmental footprint while discovering unique fashion finds. It is celebrated in the United States, where local and national thrift stores, consignment shops, and online resale platforms highlight their missions and encourage donations. Organizations like Goodwill and The Salvation Army Family Stores often run campaigns emphasizing the environmental and community benefits of their operations. Participants are encouraged to share their thrift store finds on social media using specific hashtags, and many engage in activities such as clothing swaps or creating outfits solely from secondhand items. Sustainable fashion brands like Patagonia and REI also promote their repair and resale programs in conjunction with this holiday.