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Fix Project for the Web Vacation Days Not Rescheduling Tasks

Chanuka Geekiyanage Oct 12, 2026 869 views

Question details

The user needs to resolve an issue where scheduled tasks do not automatically move or adjust after vacation days are added to the project calendar.

Fix Project for the Web Vacation Days Not Rescheduling Tasks

Product: Microsoft Project for the Web
Device & OS: not provided
Scenario: Managing a project schedule and attempting to block out time for team member vacations or holidays.
Observed behavior: Tasks scheduled during the vacation period remain in place and do not shift or reschedule to account for the newly added nonworking days.

Before you start

Ensure you have the necessary project management permissions to edit calendar settings, resource assignments, and task dependencies within Microsoft Project for the Web.

Solution 1Recommended

Configure Nonworking Days and Reassign Calendars

Use this solution to ensure the vacation days are properly recognized by the system and applied to the relevant tasks and resources.

For tasks to shift automatically around vacation days, the system must recognize those days as 'nonworking time' and the calendar must be directly tied to the resource performing the task.

Configure nonworking days

Navigate to the project calendar settings and verify that the intended vacation dates are explicitly marked and saved as nonworking days.

Assign calendar to resources

Go to the resource management area. Confirm that the updated calendar containing the vacation days is assigned to the specific team members working during that period.

Check task calendar assignments

Select the specific tasks that failed to reschedule, open their details pane, and ensure they are utilizing the updated resource calendar rather than a default project calendar.

Configure Nonworking Days and Reassign Calendars

Calendar Sync: Once the correct calendar is applied to the resource, tasks assigned to them will automatically expand or shift around the nonworking periods.

Solution 2

Review and Adjust Task Dependencies

Check for conflicting constraints or dependencies that might be locking the task dates in place.

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Frequently Asked Questions

Why do my tasks ignore the project calendar in Project for the Web?

Tasks may ignore the project-level calendar if they are assigned to a specific resource whose personal calendar overrides the project settings, or if the task has a fixed date constraint applied.

Can I set a half-day vacation as nonworking time?

Yes, you can customize the specific working hours for a given day in the calendar settings to reflect a half-day. This will partially reduce the working hours available, causing the task duration to recalculate accordingly.

How do fixed task constraints prevent automatic rescheduling?

If a task is manually set to start or finish on a specific date, the scheduling engine prioritizes that manual constraint over calendar availability, meaning it won't shift even if a vacation day is introduced.

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