A timetable is a more detailed form of a calendar, with each day divided into periods of time (usually hours, but it can be any other division of time as well), and events or tasks marked against each period. Timetables may be daily (with the same schedule followed each day), or weekly (with a different schedule for each day in the week). When specific times are to be noted rather than periods of time, the timetable often takes the form of a list of events, with the time marked next to each event.
Timetables can be useful for time management, personal planning, or widespread communication and mobilization (for instance scheduling events, tasks, meetings, etc.).
Some examples of timetables are the event plan for a conference, or the start and end timings of human rights incidents.