You'll find Event Challenges within the Challenge Menu. Psyonix says completingRL Items Frosty Fest Challenges will internet you seasonal rewards just like the Holiday Bow Topper and Holiday Hearth Wheels, in addition to Golden Gifts, which includes items from the Accelerator and Elevation Series. If you play Rocket League before Frosty Fest ends on January 4th, you could also nab the snowman Antenna totally free.
The 3 Frosty Fest limited-time modes are Winter Breakaway, which starts alongside Frosty Fest later today, Spike Rush from December 21st, and 2v2 Heatseeker from December 28th. Winter Breakaway is a new addition, giving a "twist on Snow Day mode" with a hockey rink area. Frosty Fest is that this 12 months's very last in-game event. It begins later these days and runs for Cheap Rocket League Items the subsequent three weeks, ending on January 4th.
