title: Build excel sheet with Ruby on Rails
body: <p>I want to build a spreadsheet(.xlsx) and wondering if its possible to build columns based on dates cells.
  Build the date row like this:
  <a href="https://i.stack.imgur.com/3EMqY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3EMqY.png" alt="enter image description here" /></a></p>
  <p>Whats gem would you guys recommend for this?</p>