WASHINGTON — If your coworkers show up Friday in some bold fashion choices, there’s a good reason: Dec. 12 is National Ugly Christmas Sweater Day.

According to MarketWatch, Groupon Inc. has sold 40,000 ugly sweaters since mid- October, a top seller between Black Friday and Cyber Monday.

Also since October, Groupon has run about 24 ugly sweater deals, including ones for dogs and small children, MarketWatch reports.

In other stores, the ugly sweaters are featured alongside better looking clothing.

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