Issue:
I want to reduce my Amazon EC2 usage by stopping and starting instances at predefined times or utilization thresholds. Can I configure AWS Lambda and AWS CloudWatch to help me do that automatically?
Short Description:
You can use a CloudWatch Event to trigger a Lambda function to start and stop your EC2 instances at scheduled intervals.
Resolution:
See AWS Web Page for more: https://aws.amazon.com/premiumsupport/knowledge-center/start-stop-lambda-cloudwatch/