I don't understand - you expect that people will be running your game without closing it for several months?
You can use Date object, use Date.GetMonth(Date.now) expression to get current month number. For example 0 is January, 1 is February etc.
Sorry.. i meant it was like what server sided games usually do.. its like there is a boolean value being true, and after a month if they did not open the game, the value will be false. Is that possible?
Maybe if there there is something that can track real time locally that will make the system knows if the user were not touched the game for a month.
Thank you for the answer