title: Rails select_date form name
body: <p>As much as I love rails, I've always hated dealing with dates in an html form...especially when the date isn't an object's property.</p>
  
  <p>The select_date helper is nice, but it always generates this:</p>
  
  <pre><code>&lt;select name="date[year]" id="date_year"&gt;
  &lt;select name="date[month]" id="date_month"&gt;
  &lt;select name="date[day]" id="date_day"&gt;
  </code></pre>
  
  <p>And I can't figure out a way to change the name prefix from "date" to something else. Is there a way to do this? What do you all use for date inputs when they're not an object property?</p>