The HITMAN website has a global launch schedule for the rollout of episode one of the new HITMAN series. This can be complicated for various consoles, but plans for the PC edition of the game are sort of straightforward, as word is: "All PC players will get access to the game at the same time globally, starting on 09:01 PST, March 11." Most of the start times are centered around midnight, so we're assuming they actually meant 09:01 pm PST March 10, as that would be 12:01 am EST, but you know what happens when you assume, so it may actually be launching at noon tomorrow.