Defined in github.com/aws/aws-sdk-go/service/ec2/api.go
The start date of the request. If this is a one-time request, the request becomes active at this date and time and remains active until all instances launch, the request expires, or the request is canceled. If the request is persistent, the request becomes active at this date and time and remains active until it expires or is canceled.
Default: The request is effective indefinitely.