While in the process of choosing the appropriate trigger for your automation, you will be given the option to categorize the triggers, so that you only peruse the ones relevant to your current design. One of the categories is called Scheduling and it involves those triggers related to calendar events, based on Custom Fields of the Date Time variety.
Select the Scheduling category from the drop-down list.
The trigger that falls under the Scheduling category is:
- The When a specific day is reached trigger