1. First, click on "Marketing"

2. Once that's done, click on "Workflows".

3. After that, click on "Create Workflow".

4. Once that's done, click on "Start from Scratch".

5. After, click on "Add New Trigger".

6. After that, click on "Custom Date reminder".

7. Afterwards, click on "Add filters".

8. After, click on "Custom Date Field".

9. Select from the drop-down menu.

10. Click on "Has Tag".

11. Select a tag from the drop-down menu.

12. As the final step, click on "Save Trigger".
