St. Joseph's Church in Gardner, Massachusetts, which is celebrating its centennial this year, will hold its annual Polish picnic this Sunday, Aug. 10 on the church grounds at 358 Pleasant St.   The event will begin with an 11 a.m. Mass outdoors (weather permitting), followed by  Polish food and various activities/sales tables until 5 p.m. Dennis Polisky & the Maestro’s Men will be the polka band  playing from 1 to 5 p.m.   Barbara Proko and Janice Baniukiewicz Stickles will be on hand to sell signed copies of their Arcadia photo histories, Worcester County's Polish Community (Gardner is one of about 10 communities featured) and The Polish Community of Worcester (which focuses on Polonia in the city of Worcester).   For more info on this thriving, historic Polish parish, see: http://stjosephsofgardner.org/index.shtml   Hope to see you!   Barbara Proko (Worcester, Mass. native)