/code>) is also supported. Here are some general rules and examples to explain how shift strings are interpreted:</p>

<p>Date-only values are shifted using the following formats:</p>

<pre><code>    &#39;Y:M:D&#39;     - shift date by &#39;Y&#39; years, &#39;M&#39; months and &#39;D&#39; days
    &#39;M:D&#39;       - shift months and days only
    &#39;D&#39;         - shift specified number of days</code></pre>

<p>Time-only values are shifted using the following formats:</p>

<pre><code>    &#39;h:m:s&#