A time horizon, also known as a planning horizon, is a fixed point of time in the future at which point certain processes will be evaluated or assumed to end. It is necessary in an accounting, finance or risk management regime to assign such a fixed horizon time so that alternatives can be evaluated for performance over the same period of time.

Time Horizon and the Discount Rate
Time Horizon Effects on Product Evaluation Strategies
Risk-Sensitive Control on an Infinite Time Horizon
Time horizon and equilibrium selection in tacit coordination games: Experimental results
Method and system for developing a time horizon based investment strategy
Existence of Optimal Programs of Accumulation for an Infinite Time Horizon
Emotional Satisfaction and Physical Pleasure in Sexual Unions: Time Horizon, Sexual Behavior, and Sexual Exclusivity
Deterministic inventory model with two levels of storage, a linear trend in demand and a fixed time horizon
Better late than never? On the chance to become highly cited only beyond the standard bibliometric time horizon
Two storage inventory problem with dynamic demand and interval valued lead-time over finite time horizon under inflation and time-va...