The economy in Antigua and Barbuda is primarily service based with a focus on tourism. General business is usually conducted from 8:30 AM to 4 PM , Monday–Saturday, except for Thursday afternoon, when many shops close. Banks are open from 8 AM to noon five days a week, and on Friday additionally from 3 to 5 PM . St. John's is the main commercial center with many small shops and a few larger supermarkets. Fresh seafood and produce are sold in Saturday morning markets; however, the agricultural sector is very small.