The December 10th release date cited on all the marketing material refers to GMT, so the game is out when the clock strikes 12:00 AM on the 10th in that time zone, globally, on PC and Stadia. The other regions to which you can refer to have been listed by CD Projekt Red as follows:

If you’re looking to play #Cyberpunk2077 as soon as it’s available, here’s a map with global release timings. For PC and Stadia players, the release is simultaneous and scheduled for midnight GMT, and for all console players – midnight local time. pic.twitter.com/W0QLIFAhH1 — Cyberpunk 2077 (@CyberpunkGame) December 3, 2020

Los Angeles - 4 PM PST, December 9 Mexico City - 6 PM CST, December 9 New York - 7 PM EST, December 9 Bogota - 7 PM COT, December 9 Brasília - 9 PM BRT, December 9 Paris - 1 AM CET, December 10 Warsaw - 1 AM CET, December 10 Cairo - 2 AM EET, December 10 Johannesburg - 2 AM SAST, December 10 Moscow - 3 AM MSK, December 10 Istanbul - 3 AM TRT, December 10 Dubai - 4 AM GST, December 10 Beijing - 8 AM CST, December 10 Singapore - 8 AM SGT, December 10 Seoul - 9 AM KST, December 10 Tokyo - 9 AM JST, December 10 Sydney - 11 AM AEDT, December 10 Auckland - 1 PM NZDT, December 10

The console versions of the game will become available on December 10, 12:00 PM local time wherever you are - this might mean getting it late, or getting it early depending on where you live! Pre-loading on PC is available from December 7, 12 PM CET via GOG and 5 PM CET via Steam and Epic Games Store. Pre-loading on Xbox is available from December 3, 5 PM CET and December 8, 12 PM CET on PlayStation. Considering how huge the additional downloads and patches will be at launch, we suggest you get pre-loading as soon as possible to be ready to play when the game launches! Some copies got out into the wild early, so be cautious of spoilers online.

Cyberpunk 2077 Global Launch Times   Pre Loading Revealed - 89