It is officially called "Heart of the City Farmers Market."
The market is open on Wednesdays from 7AM-5:30PM and Sundays from 7AM to 5PM, year-round, rain or shine. It's a smaller market than the Ferry Plaza Farmers Market, but much cheaper and much less touristy. The crowd is also much less yuppie, and much more diverse. As a rule, the Wednesday market tends to be higher in attendance, both by buyers and sellers.