# SObject Collection to Calendar Marked Date Collection

## Overview

This action streamlines the process of highlighting important dates on an Avonni Date Picker component. It takes data from your Salesforce objects and automatically converts it into a format that the [Date Picker](/flow/flow-components/date-picker.md) understands, making it easy to mark key dates visually.

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## **How it Helps**

Imagine you want to show upcoming opportunity close dates on a calendar. This action lets you easily pull those dates from your opportunity records and display them as marked dates on the Date Picker, giving your users a clear visual overview.

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## **When to Use It**

This action is perfect for:

* **Highlighting key dates from any Salesforce object.**
* **Visualizing deadlines, events, or milestones on a calendar.**
* **Improving the user experience of the Avonni Date Picker.**
* **Avoiding complex code or workarounds for marking dates.**

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## **Example**

To display all upcoming Task due dates for a Contact on a calendar:

1. **Retrieve Tasks:** Use a "Get Records" element to fetch the Contact's Tasks.
2. **Configure the Action:** Select the Task collection and map the "Due Date" field.
3. **Display on the Date Picker:** Connect the action's output to the "Marked Dates" attribute of the Avonni Date Picker component.

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## **Key Considerations**

* Ensure the date field you select is valid for the chosen object.
* Customize the appearance of marked dates using styling options.
* For advanced date manipulation, use formulas or Apex before using the action


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