Description

The awslogs driver only uses the datetime format as a quasi-canned multi-line split, meaning that it's properly used to split up event lines but the resulting lines cloudwatch events do not match the logged event time. If you have the datetime format available, why not use it to also set the cloudwatch event time.

This would also provide more parity with the cloudwatch logs driver, which does leverage it's datetime format to properly set cloudwatch event times.