public void setStartDateTime(String startDateTime) {
        this.startDateTime = startDateTime;
    }
<p>
A JSON object containing start and date time (UTC). Date and time format is RFC 3339 :
'yyyy-MM-dd'T'HH:mm:ss.SSSZZ'.
</p>

@param startDateTime
       A JSON object containing start and date time (UTC). Date and time format is RFC 3339 :
       'yyyy-MM-dd'T'HH:mm:ss.SSSZZ'.
aws-java-sdk-support/src/main/java/com/amazonaws/services/support/model/DateInterval.java