public String getPreferredBackupWindow() {
        return this.preferredBackupWindow;
    }
<p>
The daily time range during which automated backups are created if automated backups are enabled.
</p>
<p>
Not applicable. The daily time range for creating automated backups is managed by the DB cluster. For more
information, see <a>ModifyDBCluster</a>.
</p>
<p>
Constraints:
</p>
<ul>
<li>
<p>
Must be in the format hh24:mi-hh24:mi
</p>
</li>
<li>
<p>
Must be in Universal Time Coordinated (UTC)
</p>
</li>
<li>
<p>
Must not conflict with the preferred maintenance window
</p>
</li>
<li>
<p>
Must be at least 30 minutes
</p>
</li>
</ul>

@return The daily time range during which automated backups are created if automated backups are enabled.</p>
        <p>
        Not applicable. The daily time range for creating automated backups is managed by the DB cluster. For
        more information, see <a>ModifyDBCluster</a>.
        </p>
        <p>
        Constraints:
        </p>
        <ul>
        <li>
        <p>
        Must be in the format hh24:mi-hh24:mi
        </p>
        </li>
        <li>
        <p>
        Must be in Universal Time Coordinated (UTC)
        </p>
        </li>
        <li>
        <p>
        Must not conflict with the preferred maintenance window
        </p>
        </li>
        <li>
        <p>
        Must be at least 30 minutes
        </p>
        </li>
aws-java-sdk-neptune/src/main/java/com/amazonaws/services/neptune/model/ModifyDBInstanceRequest.java