Soon after the development of Half-Life 2 began, Valve realized that the game (Which would have to be the best game ever) was going to take impossible amounts of time to complete. Doug Lombardi spear-headed a secret project known as Valve Time.
Victor Antonov, working with a team of MIT scientists, was able to develop a device to manipulate the space around the Valve offices, altering the flow of time within its field. This allows Valve to take as much time as they need to develop games, but causes confusion between the offices and the outside world as to release dates. To help solve this communications problem, a team of engineers have studied the Valve Time phenomenon and compiled the following chart: