title: How do i query a database with local timezone ? (Ruby on Rails)
body: <p>I am in the Asia/Taipei timezone(utc+8).</p>
  <p>Rails database time are stored in UTC format, so when I wanna query records that created_at time at 5:xx.</p>
  <pre><code>Model.where('EXTRACT(HOUR FROM created_at) = ?', 5)
  </code></pre>
  <p>It always got 13:xx records(5+8), how to fix query with timezone?</p>