Momentjs - Week Numbers When April Is Week One
<p>Using this function in momentjs I can find the week number of the year:</p>

<pre><code>    var dt = new Date();
    var weekNumber = moment(dt).week();
</code></pre>

<p>Can anyone tell me how to set the first week in April as week one, and therefore for week 52 to be the last week in March.</p>

<p>In the documentation I can only see how to adjust the first day of the year (ie Sunday or Monday). I need to do both. Saturday will actually be day one.</p>

<p>Help much appreciated.</p>