Xbox owners are moving to New Zealand en masse ahead of the Forza Horizon 6 release time on Xbox Game Pass. For reasons I'm sure you know well enough by now.
For those who own an Xbox and have somehow missed it, the New Zealand trick refers to players changing the location on their Xbox console to make it think they're in New Zealand, which in turn allows them to play games that are set to release at 12am local time at the earliest possible moment – aka the New Zealand timezone. It's been a thing for years – and while technically possible on other platforms, it's far easier to do on Xbox, as the likes of PlayStation require you to buy the game from the New Zealand storefront too.
