used to specify the intended or scheduled time for an event, activity, or arrangement
used to indicate the deadline or point in time at or before which an action or event is expected to occur or be completed
used to indicate the arrival or occurrence of a particular time, event, or situation
used to indicate that something has happened or existed throughout a long period of time
used before a specific period of time to show when or at what time something happens or how long it takes for it to happen
used to indicate that someone or something is waiting for or dependent on another event, decision, or action
used to indicate a specific point in time or a reference point from which information or a situation is being considered
referring to the period or duration during which something happens, develops, or takes place