HARMONY — The Harmony Museum’s second Museum Shop First Friday open house will be held from 4 to 7 p.m. Friday at the Wagner House annex and garden at 222 Mercer St.

The First Friday events have a theme based on a “National Day” designated for the date. Friday’s outing marks “National Donut Day.”

Visitors are invited to socialize while enjoying freshly made mini donuts, various beverages and music.

The museum offers the programs on the first Friday of each month during the summer.

The Museum Shop will have a 15 percent discount on purchases during the three-hour First Friday event.

Visitors also are encouraged to use a free map to self-tour Harmony’s National Historic Landmark District.