This huge medieval-smelling market always takes place the first weekend of July:
food and drink to taste , local farm products and barbecues, arts and crafts, music and entertainment, fancy dress parade, Sunday mass in the cathedral like in the old days (no chairs, people in medieval costumes)... books, workshops...
The main street: r. St-Patrice, r. St-Malo and even further is closed to traffic on Saturday morning and becomes a market where anything can be found, especially foodstuffs.(Other VT members have noted this). As you can see, even the rain does not dampen the activity.
When people meet, they kiss on the cheeks (this typical French gesture is called se faire la bise). Unlike in other places, the number of bises in Bayeux is quite fix: two kisses seems to be the most frequent option, although three are also possible. I even saw two people exchange five kisses, but that is not typical of the area.