We love to hear your feedback. Your suggestions and ideas are important to us. Our feedback forum is a great place to post your ideas and vote on others. Please share your detailed use case and how the proposed enhancements can increase value to your business. We do read all of your posts, but may not be able to respond to all comments.
More information on the status of submitted ideas can be found here
Thank you for taking the time to share your idea.
Looker doesn't currently support scheduling Looks or Dashboards on the last day of the month. As a workaround, schedule them monthly on the 1st to receive the full previous month's data.
For more information, refer to the Enhanced Reporting: Schedules article.