Polyphony writes: “On 22 December, we have implemented the Holiday Season update for Gran Turismo Sport.
This update adds the new GT League Campaign mode, as well as new cars and course layout. 23 December 2017 is also the day of the 20th Anniversary since the first Gran Turismo was released in Japan for the very first time. This update celebrates our anniversary, and at the same time it is also our Holiday Season present to you all.”
[Source: gran-turismo.com ]