title: How long will datetime64 and timedelta64 remain experimental for?
body: <p>The <a href="http://docs.scipy.org/doc/numpy-dev/reference/arrays.datetime.html" rel="nofollow noreferrer">numpy manual for version 1.12</a> states on the topic of datetimes and timedeltas:</p>
  
  <blockquote>
    <p>Note</p>
    
    <p>The datetime API is experimental in 1.7.0, and may undergo changes in future versions of NumPy.</p>
  </blockquote>
  
  <p>NumPy 1.7.0 was apparently released <a href="https://lwn.net/Articles/537828/" rel="nofollow noreferrer">in February 2013</a>, version 1.8.0 dates from <a href="https://mail.python.org/pipermail/python-announce-list/2013-October/010091.html" rel="nofollow noreferrer">October 2013</a>, and version 1.9.0 was released in <a href="http://comments.gmane.org/gmane.comp.python.numeric.general/58741" rel="nofollow noreferrer">October 2014</a>.  Version 1.12 is expected late 2016 or early 2017.</p>
  
  <p>Are there any concrete plans to stabilise the NumPy <code>datetime64</code> and <code>timedelta64</code> APIs?  If yes, is there a target version beyond which we can expect such stabilisation?  Or are there some major unsolved problems and should we expect it to remain experimental for the time being?</p>