Musicians and bands in styles including funk, blues, gospel, bluegrass and so many more serenade passersby from porches throughout Somerville.
Parking restrictions will be relaxed in residential areas from 12 to 6 pm.
There are three time slots for the day based on three quadrants of the city.
See the website for a map of porch locations as well as a schedule of musical performances.
Rain date: Sunday, May 15