4 listings in Campbell, 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 Campbell: Sunday (1).
Few Campbell listings have a schedule or SNAP authorization we could source. Saratoga, 3 miles away, has 7 listings with more sourced detail; see also all of California.