They’re part of the Featured Multiplayer mode.
Turn 10 promised to dish out the details on Forza Motorsport’s multiplayer modes ahead of the weekend, and this is precisely what the developer has done. As per a blog post, we’re told about the multiplayer offering in the game, and how it will include a lot of real-world time-based events.
The biggest new mode will be Featured Multiplayer, which is „designed to have the feel of a real-world race weekend, with races scheduled to begin at specific real-world times.
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USA — software Forza Motorsport will feature races that start at real-world times