public String getPreferredBackupWindow() {
        return this.preferredBackupWindow;
    }
<p>
The daily time range during which automated backups are created for your new database if automated backups are
enabled.
</p>
<p>
The default is a 30-minute window selected at random from an 8-hour block of time for each AWS Region. For more
information about the preferred backup window time blocks for each region, see the <a href=
"https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithAutomatedBackups.html#USER_WorkingWithAutomatedBackups.BackupWindow"
>Working With Backups</a> guide in the Amazon Relational Database Service documentation.
</p>
<p>
Constraints:
</p>
<ul>
<li>
<p>
Must be in the <code>hh24:mi-hh24:mi</code> format.
</p>
<p>
Example: <code>16:00-16:30</code>
</p>
</li>
<li>
<p>
Specified in Coordinated Universal Time (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 for your new database if automated
        backups are enabled.</p>
        <p>
        The default is a 30-minute window selected at random from an 8-hour block of time for each AWS Region.
        For more information about the preferred backup window time blocks for each region, see the <a href=
        "https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithAutomatedBackups.html#USER_WorkingWithAutomatedBackups.BackupWindow"
        >Working With Backups</a> guide in the Amazon Relational Database Service documentation.
        </p>
        <p>
        Constraints:
        </p>
        <ul>
        <li>
        <p>
        Must be in the <code>hh24:mi-hh24:mi</code> format.
        </p>
        <p>
        Example: <code>16:00-16:30</code>
        </p>
        </li>
        <li>
        <p>
        Specified in Coordinated Universal Time (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-lightsail/src/main/java/com/amazonaws/services/lightsail/model/CreateRelationalDatabaseRequest.java