Dac, otherwise called Mon Cala, was the planet upon which the city of Dac City was located. King Lee-Char engaged in discussions concerning potential trade agreements between Mon Cala and the Galactic Empire with Imperial ambassador Telvar in this location, sometime following the Proclamation of the New Order. The Battle of Dac City, which involved the landing of Imperial troops in the city, occurred after Ambassador Telvar's death.
The comic Darth Vader (2017) 13, a canon work from 2017 written by Charles Soule and with illustrations by Giuseppe Camuncoli, marked the initial appearance of Dac City.