title: Sequelize query with dates
body: <p>I'd like to make a query on dates using SequelizeJS but i don't know how to do and there is nothing on that on the website...</p>
  
  <p>My code :</p>
  
  <pre><code> var day = request.params.day;
   Appointment.findAll({where: ["start.day() = day"]}); // start is my column, format with DATETIME
  </code></pre>