https://wccftech.com/halo-infinite-to-launch-on-december-8th-according-to-leak/

Halo Infinite will be released on December 8th. The news broke earlier today with a leak spotted by Italian website Aggiornamenti Lumia on the Microsoft Store itself, which mentioned the date. However, when we tried to check for ourselves, the date had already reverted to the placeholder December 31st.

Still, The Verge journalist Tom Warren has now confirmed the release date to be correct.