The GTA 6 trailer got out early, and Rockstar moved it up — confirmed
Rockstar posted at 23:10 UTC on Dec 4, 2023 that its trailer had leaked. It had been due Tuesday.
Leaked on 04 December 2023

At 23:10 UTC on Dec 4, 2023, @RockstarGames posted that its trailer had leaked and pointed people to the official video on YouTube.
CNBC reported that the trailer was scheduled for Tuesday but leaked on social media, so the company released it on Monday; the trailer gave a 2025 release. The Verge and The Washington Post covered the early release.
Confirmed by the publisher itself.