title: Check current set date of origin in R
body: <p>is there a way we can check a date column's origin date ?</p>
  
  <pre><code>as.Date(x, **origin** = , ...)
  </code></pre>
  
  <p>So that we can use this and accordingly define other numeric date columns. 
  To add to that, does it even matter if the origin dates are different ?</p>
  
  <p>Thank you.</p>