4 listings in Derry, 3 of them farmers markets. 1 has a market day and hours from a public register or the market's own website, and 1 appears in the USDA SNAP retailer register. Market days in Derry: Wednesday (1).
Few Derry listings have a schedule or SNAP authorization we could source. Milford, 18 miles away, has 5 listings with more sourced detail; see also all of New Hampshire.
Derry Homegrown Farm & Artisan Market is authorized SNAP retailer in the USDA register. Ask at the information table how EBT tokens work at that market.