title: Datetime and suntime, TypeError: can't subtract offset-naive and offset-aware datetimes
body: <pre><code>import datetime
  from suntime import Sun, SunTimeException
  from datetime import timedelta
  
  def day_night_time(lat,long,TO_date,TO_time):
      sun = Sun(lat,long)
      date = datetime.date(int(TO_date[:4]), int(TO_date[5:7]), int(TO_date[8:10]))
      TO = datetime.datetime(int(TO_date[:4]), int(TO_date[5:7]), int(TO_date[8:10]),int(TO_time[:2]), int(TO_time[3:5]))
  
      day_sr = sun.get_local_sunrise_time(date)
      day_ss = sun.get_local_sunset_time(date)
      n_end = day_sr - timedelta(minutes=30)
      n_start = day_ss + timedelta(minutes=30)
  
      print(TO)
      print(n_end)
      # print(TO-n_end)
  
  
  day_night_time(50,20,'2020-06-24','10:45:00.000000')
  </code></pre>
  <p>returns</p>
  <pre><code>2020-06-24 10:45:00                                                                                                                                                           
  2020-06-24 02:02:00+00:00 
  </code></pre>
  <p>I am unable to use this as once has the +00:00 on the end. What is the best way to remove the +00:00 or add it to the other date, so that they can be used.
  Currrent error: <code>TypeError: can't subtract offset-naive and offset-aware datetimes</code></p>
  <p>Many thanks for your help</p>