From nediv.arrl.org:
WBZ radio 1030 kHz in Boston is celebrating its 100th anniversary in 2021. It is the oldest broadcast station in New England, and one of the oldest stations in the United States.
The Billerica Amateur Radio Society and the Hampden County Radio Association in Springfield, will help commemorate this anniversary by sponsoring a special operating event starting at 1300z/9:00 am EDT September 17 and ending at 0400z/12 am EDT on September 19. Amateurs from across New England will operate W1W, W1B, W1Z, and WB1Z on various bands and modes. A special QSL card will be sent to anyone who contacts one or more of the special event stations. A historical sheet will also be available for download. The card will feature historical photos of WBZ over the years as well as a special 100th Anniversary WBZ logo.
For updated information, please visit https://nediv.arrl.org/wbz100.