Disabling Weekends for your Workspace allows you to translate Milestone and Task durations from actual days to working days.
Disabling Weekends
The Workspace Owner can Disable Weekends from inside the General Settings section of Workspace Settings.
Doing so will block out weekends from your Roadmap and Overviews as well as remove those days from Milestone and Project durations.
Before disabling weekends
After disabling weekends