public String getOffset() {
        return this.offset;
    }
<p>
The offset for the tumbling window. The <code>offset</code> parameter accepts the following:
</p>
<ul>
<li>
<p>
The offset time.
</p>
<p>
For example, if you specify <code>18h</code> for <code>offset</code> and <code>1d</code> for
<code>interval</code>, IoT SiteWise aggregates data in one of the following ways:
</p>
<ul>
<li>
<p>
If you create the metric before or at 6 PM (UTC), you get the first aggregation result at 6 PM (UTC) on the day
when you create the metric.
</p>
</li>
<li>
<p>
If you create the metric after 6 PM (UTC), you get the first aggregation result at 6 PM (UTC) the next day.
</p>
</li>
</ul>
</li>
<li>
<p>
The ISO 8601 format.
</p>
<p>
For example, if you specify <code>PT18H</code> for <code>offset</code> and <code>1d</code> for
<code>interval</code>, IoT SiteWise aggregates data in one of the following ways:
</p>
<ul>
<li>
<p>
If you create the metric before or at 6 PM (UTC), you get the first aggregation result at 6 PM (UTC) on the day
when you create the metric.
</p>
</li>
<li>
<p>
If you create the metric after 6 PM (UTC), you get the first aggregation result at 6 PM (UTC) the next day.
</p>
</li>
</ul>
</li>
<li>
<p>
The 24-hour clock.
</p>
<p>
For example, if you specify <code>00:03:00</code> for <code>offset</code>, <code>5m</code> for
<code>interval</code>, and you create the metric at 2 PM (UTC), you get the first aggregation result at 2:03 PM
(UTC). You get the second aggregation result at 2:08 PM (UTC).
</p>
</li>
<li>
<p>
The offset time zone.
</p>
<p>
For example, if you specify <code>2021-07-23T18:00-08</code> for <code>offset</code> and <code>1d</code> for
<code>interval</code>, IoT SiteWise aggregates data in one of the following ways:
</p>
<ul>
<li>
<p>
If you create the metric before or at 6 PM (PST), you get the first aggregation result at 6 PM (PST) on the day
when you create the metric.
</p>
</li>
<li>
<p>
If you create the metric after 6 PM (PST), you get the first aggregation result at 6 PM (PST) the next day.
</p>
</li>
</ul>
</li>
</ul>

@return The offset for the tumbling window. The <code>offset</code> parameter accepts the following:</p>
        <ul>
        <li>
        <p>
        The offset time.
        </p>
        <p>
        For example, if you specify <code>18h</code> for <code>offset</code> and <code>1d</code> for
        <code>interval</code>, IoT SiteWise aggregates data in one of the following ways:
        </p>
        <ul>
        <li>
        <p>
        If you create the metric before or at 6 PM (UTC), you get the first aggregation result at 6 PM (UTC) on
        the day when you create the metric.
        </p>
        </li>
        <li>
        <p>
        If you create the metric after 6 PM (UTC), you get the first aggregation result at 6 PM (UTC) the next
        day.
        </p>
        </li>
        </ul>
        </li>
        <li>
        <p>
        The ISO 8601 format.
        </p>
        <p>
        For example, if you specify <code>PT18H</code> for <code>offset</code> and <code>1d</code> for
        <code>interval</code>, IoT SiteWise aggregates data in one of the following ways:
        </p>
        <ul>
        <li>
        <p>
        If you create the metric before or at 6 PM (UTC), you get the first aggregation result at 6 PM (UTC) on
        the day when you create the metric.
        </p>
        </li>
        <li>
        <p>
        If you create the metric after 6 PM (UTC), you get the first aggregation result at 6 PM (UTC) the next
        day.
        </p>
        </li>
        </ul>
        </li>
        <li>
        <p>
        The 24-hour clock.
        </p>
        <p>
        For example, if you specify <code>00:03:00</code> for <code>offset</code>, <code>5m</code> for
        <code>interval</code>, and you create the metric at 2 PM (UTC), you get the first aggregation result at
        2:03 PM (UTC). You get the second aggregation result at 2:08 PM (UTC).
        </p>
        </li>
        <li>
        <p>
        The offset time zone.
        </p>
        <p>
        For example, if you specify <code>2021-07-23T18:00-08</code> for <code>offset</code> and <code>1d</code>
        for <code>interval</code>, IoT SiteWise aggregates data in one of the following ways:
        </p>
        <ul>
        <li>
        <p>
        If you create the metric before or at 6 PM (PST), you get the first aggregation result at 6 PM (PST) on
        the day when you create the metric.
        </p>
        </li>
        <li>
        <p>
        If you create the metric after 6 PM (PST), you get the first aggregation result at 6 PM (PST) the next
        day.
        </p>
        </li>
        </ul>
        </li>
aws-java-sdk-iotsitewise/src/main/java/com/amazonaws/services/iotsitewise/model/TumblingWindow.java