2019 MAMAMOO CONCERT 4season F/W is MAMAMOO's third concert tour, and their third concert tour for the Four Seasons, Four Colors project. Their first concert for the tour was held at the Jangchung Gymnasium Seoul from April 19 to 21 of 2019, the first day at 7 PM KST, the second day at 6 PM KST, and the third and last day at 5 PM KST.