Forzathon event in Forza Horizon 3 held from February 21, 2017 at 08:00 (UTC) to February 22, 2017 at 07:59 (UTC).
During the single-day event, players could participate in various challenges to win credits, and completing all three would reward a player with the Ferrari 599XX.
Win a Race in a Ferrari to receive 10,000 Cr.
Complete an Online Race in a Ferrari to receive 10,000 Cr.
Complete a Bucket List Challenge in a Ferrari to receive 10,000 Cr.
Complete All 'Speed Machine' Challenges to win the Ferrari 599xx.