title: pd.pivot_table when columns are the dates
body: <p>I have a table that I  want to pivot</p>
  
  <p><img src="https://i.stack.imgur.com/NeVWZ.png" alt=""></p>
  
  <p>but the dates are in columns and I'm not sure how I can pivot all columns, after that I can pd.to_datetime and sort it.</p>
  
  <p>any help is appreciated.</p>