Calendars are useful at several levels:


Calendars initially appear as a visual indication. They are visible via the color range on the view to which they apply.

Drag-dropping events

Calendars apply to events.

When an event’s type is “Worked”, its behavior corresponds to the calendar of one of its resources.

Example: Impossible to position a task on a Sunday, if:

  • task events are worked,
  • the calendar is not worked on a Sunday.

In addition, its duration does not take account of the non worked periods that it includes.

Calculation of event duration

Hourly calendars are also used to automatically calculate the number of hours spent on a daily (or half-daily) event.

See Duration

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