A director would like to have an up to date Cluster Efficiency Summary report emailed...

 A time trigger is a type of playbook trigger that allows the user to specify a schedule for running a playbook. This trigger is useful for automating tasks that need to be performed periodically or at a specific time. A manual trigger requires the user to initiate the playbook execution manually, which is not ideal for a recurring task. A report trigger is a type of playbook trigger that allows the user to run a playbook when a specific report is generated. However, this trigger does not guarantee that the report will be generated on the first of every month, as it depends on the report settings. A wait until day of month action is a type of playbook action that pauses the playbook execution until a specified day of the month. This action is unnecessary if the playbook already has a time trigger that specifies the desired schedule.

References:

Nutanix Multicloud Automation Administration (NMCAA) course, Module 4: Playbooks, Lesson 4.1: Playbook Triggers

Nutanix Certified Professional - Multicloud Automation (NCP-MCA) 6.5 Exam Blueprint Guide, Section 3.1: Create a playbook to automate IT operations using X-Play