This idea has been merged into another idea. To comment or vote on this idea, please visit APP-I-5002 Add the ability to exclude non-working days from duration of a release phase.
When creating a release template, the duration in days is defined, but when adding a release using the template to the release schedule, the duration includes non-workdays (weekends). There should be a setting to define non-work days so that Release schedules will ignore those days as if they didn't exist.