title: How to create multiple records for each day in given quarter?
body: <p>I have <strong>Shift</strong> model.</p>
  
  <pre><code>--- !ruby/object:Shift
  attributes:
    id:
    starts_at:
    ends_at:
  </code></pre>
  
  <p>I want to add singelton method to create shifts for each day in given quarter.</p>
  
  <pre><code>class Shift
  
    def self.open_quarter(number, year)
      starts_at = "08:00"
      ends_at = "08:00"
  
      ...
    end
  end
  </code></pre>
  
  <p>How to implement that in best way? I want that each shifts starts_at 8.00 am and finish 8.00 am on next day.</p>