https://wccftech.com/halo-infinite-season-1-extended-6-months-biggest-launch-ever-pc/

Halo Infinite multiplayer shadow launched today, which is certainly exciting, but players should be aware that the game won’t be getting a second season of content for some time. Originally, 343 Industries promised a fairly standard cadence for seasons with a new one coming every three months, but they’ve now revealed Halo Infinite Season 1 will be sticking around until May 2022. With the early launch, that means Season 1 will last six months rather than three. According to 343, they delayed in order to avoid crunch following a somewhat stressful launch.

You will notice in the Battle Pass UI that Season 1 will last from now until May 2022, which is a change from our original goal of shipping a new Season every three months. We made the decision to extend Season 1 to give ourselves more time to ensure Season 2 meets our high-quality bar and so we can finish development for Season 2 in a healthy and sustainable way for our team.