Customize project calendars

Calendars in Fusion Online define the working and non-working time for your project—this includes working hours, weekends, holidays, and any other exceptions. Customizing your project calendar allows you to:

  • Ensure tasks are scheduled only during valid working time

  • Accurately reflect team or regional working patterns

  • Control how long tasks take based on resource availability

  • Model constraints like facility shutdowns or part-time resources

By default, when you create a project, it inherits a calendar copied from a system calendar, which can then be customized for the project’s specific needs.

Types of calendars

Fusion Online supports multiple types of calendars that influence how tasks and assignments are scheduled:

  • System Calendars – Defined centrally and used as the base for new projects and user calendars

  • Project Calendars – Copied from a system calendar when a project is created, and customized as needed for that specific project

  • User Calendars – Determine individual user availability and are used by the Assignment Scheduler

How to customize a project calendar

  1. Go to the Project Details view for your project.

  2. Click the Calendars tab.

  3. You’ll see the default project calendar listed. Click its name to open the Calendar Details view.

  4. From there, you can:

    • Modify standard working hours

    • Add or remove non-working days (e.g., holidays)

    • Create exceptions

These updates apply to the current project only—they do not affect other projects using the same system calendar.

When should you customize the calendar?

  • Your team follows a non-standard workweek (e.g., 4-day week)

  • You need to account for region-specific holidays

  • The project includes scheduled downtime

  • You want to simulate scenarios with reduced or increased resource availability

See also

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