The HPM 150 celebration was held from August 31, 2019 through September 8, 2019 to commemorate the 150th anniversary of the birth of ARRL’s first president and cofounder Hiram Percy Maxim, W1AW, born on September 2, 1869. The event was open to all amateurs, with the objective of working as many participating stations as possible during the 9-day event.