title: How to parse timezone with colon
body: <p>Is there a way to parse timezone in "+00:00" format with <code>datetime.strptime</code>? For instance:</p>
  
  <pre><code>Python 3.4.3 (v3.4.3:9b73f1c3e601, Feb 24 2015, 22:43:06) [MSC v.1600 32 bit (In
  tel)] on win32
  Type "help", "copyright", "credits" or "license" for more information.
  &gt;&gt;&gt; from datetime import datetime
  &gt;&gt;&gt; datetime.strptime("12:34:56+0000", "%X%z")
  datetime.datetime(1900, 1, 1, 12, 34, 56, tzinfo=datetime.timezone.utc)
  &gt;&gt;&gt; datetime.strptime("12:34:56+00:00", "%X%z")
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
    File "C:\Python34\lib\_strptime.py", line 500, in _strptime_datetime
      tt, fraction = _strptime(data_string, format)
    File "C:\Python34\lib\_strptime.py", line 337, in _strptime
      (data_string, format))
  ValueError: time data '12:34:56+00:00' does not match format '%X%z'
  </code></pre>
  
  <p>Any ideas?</p>