What hour does the counter stop at?
Rockstar has named a day and has never named a time on it. So the counter above runs to midnight UTC at the start of 19 November 2026 — not to the moment the game becomes playable, because that moment has not been published by anybody.
The one time-related arrangement that is on record is pre-load, a week earlier. Everything else about launch night, including the two ways a release of this size normally unlocks, is on unlock time and pre-load.