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Under utils/common.py, 

TIMESTAMP_FORMAT_MILLIS = '%Y-%m-%dT%H:%M:%S.%fZ'

The %f produces time with microseconds, for example: 2020-03-18T19:43:18.115783Z.


However, when interacting the AWS s3 and sns apis, I receive DateTimes like this:

2020-03-02T22:32:13.240Z
i.e. milliseconds. 

This seems like a simple change to the utils. TIMESTAMP_FORMAT_MILLIS is named as if it should be millis as well. This is seems like a simple change. Is there a reason it should be microseconds?
version = version or '$LATEST'
    func_version = func_details.get_version(version)
    result = {
        'CodeSha256': func_version.get('CodeSha256'),
        'Role': func_details.role,
        'Version': version,
        'FunctionArn': func_details.arn(),
        'FunctionName': func_details.name(),
        'CodeSize': func_version.get('CodeSize'),
        'Handler': func_details.handler,
        'Runtime': func_details.runtime,
        'Timeout': func_details.timeout,
        'Description': func_details.description,
        'MemorySize': func_details.memory_size,
        'LastModified': func_details.last_modified,
        'TracingConfig': {'Mode': 'PassThrough'},
        'RevisionId': func_version.get('RevisionId'),
        'State': 'Active'
    }
    if func_details.envvars:
        result['Environment'] = {
            'Variables': func_details.envvars
        }
    if (always_add_version or version != '$LATEST') and len(result['FunctionArn'].split(':')) <= 7:
        result['FunctionArn'] += ':%s' % version
    return result
def forward_to_fallback_url(func_arn, data):