Here is how to check when an EC2 instance was created:
Option 1. Check the Volume attachment time
![When the AWS EC2 instance was created image - When the AWS EC2 instance was created](https://i0.wp.com/pcx3.com/wp-content/uploads/2022/08/image.png?resize=736%2C278&ssl=1)
Option 2. Using a Python script
import boto3
ec2 = boto3.resource('ec2', region_name='instance_region_name')
volume = ec2.Volume('vol-id')
print volume.create_time.strftime("%Y-%m-%d %H:%M:%S")