The market will be open Thursdays through Saturdays, and will run through October 31.
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All Upcoming Events, Starting on Sep 19, 2026
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What the Fluff? A Tribute to Union Square Innovation, a far-out festival honoring the invention of Marshmallow Fluff, returns to Union Square in Somerville on Saturday, September 19 from 1-5pm (severe weather date Sunday, September 20). Come play, delight in your food, and raise a glass to Union Square as What the Fluff? turns 21!
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