When was the first spacecraft to land on a comet?

On November 12, 2014, the Philae lander from ESA’s Rosetta mission made the first landing on a comet, 67P/Churyumov-Gerasimenko. The landing was bouncy and partly uncontrolled because the harpoons failed, but Philae still sent back valuable data. It was the first time a spacecraft touched down on the surface of a comet. The mission helped scientists study how primitive Solar System material behaves.