On June 21, Oak Bluffs will kick off summer with two well-known events, HarborFest and Summer Solstice, merged into one day of outdoor entertainment called the Day of Water, Night of Lights.

The day will begin at noon with the 17th annual HarborFest featuring music, arts, crafts and family entertainment nestled between the harborfront and the gingerbread cottages. Throughout the day, the harbor will host activities including the Anything that Floats Race and a demonstration by the U.S. Coast Guard.

As the day winds down, the party is scheduled to start up on Circuit avenue.

The night begins with an outdoor street fair with shopping, dining, music and entertainment as the avenue is transformed into a pedestrian walking mall.

The night will culminate at 9 p.m. with the first-ever Summer Solstice fireworks display over the Sound visible from Ocean Park.

The Oak Bluffs Association is organizing the event.

For more information on the festival or to download an application for vending, visit oakbluffs.mv and click the events tab on the home page, or you e-mail obainfo@yahoo.com.

More information also is available by calling 617-935-4840.