1. First up, click on "Marketing"

2. Click on "Workflows".

3. Click on "Create Workflow".

4. Next up, click on "Start from Scratch".

5. Then, add your desired action.

6. Click on "Set Event Start Date".

7. After that, click on "Select".

8. Now, click on "Custom Field".

9. Following that, select custom field.

10. Now, click on "Specific Date/Time".

11. Now, select date.

12. Next up, click on "Specific Day".

13. Select time.

14. To end, click on "Save Action".
