---
title: "Work Plan Dates and Workday Lock"
description: "Assigning Work Plan dates based on your needs"
url: https://support.mosaicapp.com/en/articles/724-work-plan-dates-and-workday-lock
collection: "Work Plan Modal"
updated: 2026-10-29
language: en
---

# Work Plan Dates and Workday Lock

Assigning Work Plan dates based on your needs

Scheduling **Work Plan** dates emphasizes both flexibility and precision. Dates can be configured to depend on specific **Phases** or **Work Categories**, ensuring alignment with key **Project Milestones**.

1.  To schedule the Work Plan dates, click the date range. A calendar will show, select your start and end dates for the Work Plan here.
    
    ![](https://staticfiles.gleap.io/ghelparticle/aoweyMpxIAA1hT1a8jIYtgfw0QTff4EMvHKDgWKFTkMOEH3aqqffRf76blyhGMfoC8y9E8zqt8h.png)
2.  You also have options to plan by days or weeks. If plan by weeks is selected, the whole week will be automatically selected when you click any day of the week.
    
    The Work Plan can be scheduled on weekends or days with 0-hour capacity by selecting the "Working Weekends" checkbox.
    
    Similarly, the Work Plan can be scheduled on PTO days or holidays by selecting the "Working Holidays" checkbox.
    
    > **Info:** The "Working Holidays" option will be displayed when the initially opened Work Plan already has "Include Holidays" set to true, if the initial Work Plan start date is a holiday for daily planning, or if the initial Work Plan week consists entirely of holidays for weekly planning.
    
    ![](https://staticfiles.gleap.io/ghelparticle/HUBk8wEpcNkUBonkQzYYMEaDYm9vQIbXWu8uxc9eIrDyXLRu37OTQ82JJBxE6qIpot0j8pftD49.png)
    

## Work Plan Dependency

To simplify work planning, a date dependency can be set on the Work Plan, ensuring it aligns with the Phase or Work Category schedule.

> **Info:** Date dependencies can be established either during the creation of the Work Plan or later when modifying the Work Plan.

1.  Click +Add on the calendar.
    
    ![](https://staticfiles.gleap.io/ghelparticle/08DoKvzbYEUSWyByPNYWH8epTMjN6S4dJXscNnvHS8h12BkoVsBuHed283R5b7ux0v9bk7PlTqb.png)
    
2.  Select the dependency option
    
    If Phase Start is selected, you need to select an end date for the Work Plan.
    
    If Phase End is selected, you need to select a start date for the Work Plan.
    
    If Phase Start & End is selected, the Work Plan will have the same start and end date as the Phase..
    
    ![](https://staticfiles.gleap.io/ghelparticle/911dIJmx4xYcoLgocAY3jhSGVL4pVPWgsHhpIDJonlrMhBsaFGw3lBxNg9Z4TuCBOD3J8SoKoE1.png)
3.  The date that is dependent on the Phase will display a dependency icon. Click **Done** on the calendar to finalize your change.
    
    When the Phase dates change, the Work Plan dates will be updated accordingly.
    
    ![](https://staticfiles.gleap.io/ghelparticle/qTvFpI9clxC0SL4kqbyXBEaaXMdeSIT2oBa1pHV5p5LCT9mfLIeP2jQNUQu2PtTsqmI3M2myI5d.png)
    
4.  Click the "Create" button to create the Work Plan Modal with the date dependency. If modifying an existing Work Plan, be sure to click **Done** on the Work Plan Modal to save changes.
    
    The dependency handle will appear on the Work Plan bar at the start, end, or both, depending on the selected dependency.
    
    ![](https://staticfiles.gleap.io/ghelparticle/7CxI1V6yeft4srtMaf6WNSiTzDxfX5u6W55rQiWVuhXPo6mVeClBGpY8ZEd1CfpK9iOqgUKmVR6.png)
    
    It will also show on 75% view
    
    ![](https://staticfiles.gleap.io/ghelparticle/hbSkbhxmOmrXs6fRyvhqUyORCIUcLlMkheLNJEyH495KQlCuXoWuDbOwk8IJk3KFTGV87ear1FY.png)

## Workdays Lock

You can also lock the number of workdays to prevent the date change when work plan hours change. This is separate from the Hours lock, you can have one hour lock and workdays lock at the same time.

> **Warning:** The workday count will exclude Time Off days or holidays. On weekly planning work plans the count only reduced if there are more than 5 days of Time Off days or holidays.

![](https://staticfiles.gleap.io/ghelparticle/RPcJfmvFzKfAi6zPzdEoclE9XR74eYOE7mSiey2cC9nT8eWNihrimnggDt6JMVWuGJgu9gcT35Q.png)

## Add Dependencies on Work Plans with Locked Workdays

When adding a dependency to a **Work Plan** with a locked duration, Mosaic displays a confirmation modal that allows control over how the scheduling conflict should be handled.

If the dependency is added to the end date, the available options are:

-   **Move the start date** to preserve the locked number of Workdays or Weeks.
    
-   **Maintain the start date and adjust the number of Workdays** to keep the start date fixed while updating the locked duration value.
    
    ![](https://staticfiles.gleap.io/ghelparticle/Tux27p7Avfu45u3E8lJeNPKcNUwf1qib3VQJhfeP2zVqf449DBSTRlP2dEOYduzZaBtYYeomFGi.png)

If the dependency is added to the start date, the available options are:

-   **Move the end date** to preserve the locked number of Workdays or Weeks.
    
-   **Maintain the end date and adjust the number of Workdays** to keep the end date fixed while updating the locked duration value.
    
    ![](https://staticfiles.gleap.io/ghelparticle/geqhBCaLwsCNfHT2kTeE7xe04utSUDhPQcQY4uYV58lUK1ggU0iImI3pCDTRoWNOcm1mwUI0iHf.png)

Selecting **Confirm** applies the dependency and the selected scheduling adjustment. Selecting **Cancel** or closing the modal prevents the dependency from being added.