1. Click on "Settings."

2. Then, click on "Custom Fields".

3. After, click on "Add Field".

4. Select "Date Picker" as the field type.

5. Review your selected custom field.

6. Click "Next" to proceed.

7. Enter a name in the "Field Name" section.

8. Use the drop-down menu to select a "Group."

9. Another drop-down menu will appear for object selection.

10. Click on "Additional Preferences" for further customization.

11. If you require a unique key, click to customize it.

12. Once that's done, add a description of the field.

13. Lastly, click on "Save".
