Saturday is World Fair Trade Day, note the folks at Green Mountain Coffee, and these Vermonters are celebrating this red-letter day with a one-day sale on some of their certified Fair Trade coffees.

Green Mountain Coffee is the coffee segment of Green Mountain Coffee Roasters Inc. of Waterbury, Vt.

On Saturday,customers can save 20 percent on purchases of 10-ounce bags of Sumatran Lake Tawar, Kenyan Highland Cooperatives, Colombian Fair Trade Select, and Mexican Decaf Huatusco Cooperative; the discount is available for website and phone orders that day only, and customers must use promo code 7200-2242, Green Mountain Coffee said. (The phone number for placing orders is 888-879-4627.)

The 10-ounce bags typically sell for $7.69 to $8.19 apiece; on World Fair Trade Day, discounted prices will range from $6.16 to $6.56, the company said.

The varieties on sale are Fair Trade Certified, meaning that small-scale farmers were paid a fair price for their beans, the company said.