The ladder into Modern Warfare 4 has been settled since October 9: Campaign Early Access on October 16 for digital pre-orders, DMZ Early Access on October 20, and the full game with Multiplayer on October 23. What was missing was the hour. Call of Duty's official PC page answers it in one line: the full game releases on October 23 at midnight local time. IGN's October 14 rundown lists the same unlock city by city, from Los Angeles to Auckland, each at 12am in its own zone.
Official. The midnight local unlock and the October 15 PC preload window are both stated on Call of Duty's own Modern Warfare 4 PC page, which we read in full this run. That page is PC-specific, so treat the hour as official for PC and unstated for consoles until an official per-platform time publishes.
Why Hardcore SnD cares
Launch night is the one night of the year when every lobby is equally lost, which makes it the cheapest week you will ever get to learn a map pool. Knowing the unlock is local midnight rather than one North American hour changes how a roster books that night, and it changes it differently depending on where your fifth lives.
- Your start time is your latest time zone. Local midnight means an East Coast five is in three hours before a West Coast five. The first full-roster Search lobby is set by whoever unlocks last, not first, so pick the time before launch week, not during it.
- Multiplayer still has no early door. Campaign on October 16 and DMZ on October 20 do not include Multiplayer, so nobody banks Search reps before the 23rd. Everyone starts the mode at the same local hour.
- The install has to finish before the clock, not after. The official PC requirements list 115GB of SSD space at every tier, minimum through ray tracing, so a fifth who starts downloading on launch night is not playing on launch night.
- Plan the first sessions to learn, not to rank. There is still no Modern Warfare 4 Ranked Play date, so week one is pubs and private matches. For a hardcore Search roster that is the right room anyway: callouts, timings, and plant spots before anything is on the line.
Call of Duty's PC page says preloading on PC only begins October 15 at 9AM PT. The widely shared October 14 at 9 PM PT window is the general pre-installation rollout, and IGN's regional preload table is built on that one. If you are on PC and nothing appears on the evening of the 14th, that is expected, not a fault.
What is still open
The midnight local line sits in the PC section of a PC-focused post, so there is no official per-platform unlock hour on record for PS5, Xbox Series, or Switch 2. Official install sizes outside PC are not published either; the 115GB figure is the PC requirement. IGN also mentions a timezone workaround for starting early on Xbox, which we are not passing on as advice: it is not a supported path and it is not worth an account over a few hours.
What would verify the rest
An official Call of Duty blog post or Activision support article naming the October 23 unlock time per platform, or storefront countdowns on PlayStation, Xbox, and Switch 2 showing a local midnight unlock. Either would put the console clock on the same official footing as the PC one. If an official page instead names a single fixed hour, this page gets corrected.