title: PyEphem Sunrise and Sunset times wrong (python)
body: <p>I'm having some difficulty using pyEphem to get accurate sunrise and sunset times for my location. I have read a few questions and answers, and looked at the docs, but it's still not totally clear what I'm doing wrong. Here is the code:</p>
  
  <pre><code>import datetime as dt
  import ephem as ep
  
  date = dt.datetime.now().strftime("%Y/%m/%d 00:00:00")
  lat, lon = [&lt;redacted&gt;, -1.4147]
  
  # Use lat and lon to create ephem observer instance and update with given
  # values
  my_location = ep.Observer()
  my_location.lat = lat
  my_location.lon = lon
  my_location.date = date
  
  # Get sunrise of the current day
  sunrise = my_location.next_rising(ep.Sun())
  sunset = my_location.next_setting(ep.Sun())
  
  print "Given date: {0}".format(date)
  print "Detected coordinates: {0}, {1}".format(lat, lon)
  print "Sunrise at {0}".format(sunrise)
  print " Sunset at {0}".format(sunset)
  </code></pre>
  
  <p>Which produces this output:</p>
  
  <pre><code>Given date: 2015/01/31 00:00:00
  Detected coordinates: &lt;redacted&gt;, -1.4147
  Sunrise at 2015/1/31 12:28:02
   Sunset at 2015/1/31 22:47:39
  </code></pre>
  
  <p>What I was expecting was to get the times of the first sunrise after midnight (this morning) and the first sunset after that. Now I happen to know the sun came up before 12:30 today (I was walking down the road at 9:30am in broad daylight) and I don't think there's a UTC offset since I know my timezone.</p>
  
  <p>What am I missing?</p>