public void setOldestDate(java.util.Date oldestDate) {
        this.oldestDate = oldestDate;
    }
<p>
Specifies the oldest start or close date and time to return.
</p>

@param oldestDate
       Specifies the oldest start or close date and time to return.
aws-java-sdk-simpleworkflow/src/main/java/com/amazonaws/services/simpleworkflow/model/ExecutionTimeFilter.java