public ModifyInstanceEventStartTimeRequest withNotBefore(java.util.Date notBefore) {
        setNotBefore(notBefore);
        return this;
    }
<p>
The new date and time when the event will take place.
</p>

@param notBefore
       The new date and time when the event will take place.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/ModifyInstanceEventStartTimeRequest.java