You can use similar logic for any date field like due date, followup date, renewal date etc.
Note: For birthday, we need to choose date is today (ignore year). In most other cases, you won’t choose ignore year.
You can also personalize the email by clicking on the ”Add Field” dropdown. You can select the fields that you want to be added in the email body from the drop-down and the system will dynamically fetch the values from that particular Contact’s record.