diff --git a/pyicloud/cmdline.py b/pyicloud/cmdline.py
index f9d859d..950fe04 100755
--- a/pyicloud/cmdline.py
+++ b/pyicloud/cmdline.py
@@ -4,6 +4,7 @@
 A Command Line Wrapper to allow easy use of pyicloud for
 command line scripts, and related.
 """
+from __future__ import print_function
 import argparse
 import pickle
 import sys
@@ -185,19 +186,19 @@ def main(args=None):
 
             contents = dev.content
             if command_line.longlist:
-                print "-"*30
-                print contents["name"]
+                print("-"*30)
+                print(contents["name"])
                 for x in contents:
-                    print "%20s - %s" % (x, contents[x])
+                    print("%20s - %s" % (x, contents[x]))
             elif command_line.list:
-                print "-"*30
-                print "Name - %s" % contents["name"]
-                print "Display Name  - %s" % contents["deviceDisplayName"]
-                print "Location      - %s" % contents["location"]
-                print "Battery Level - %s" % contents["batteryLevel"]
-                print "Battery Status- %s" % contents["batteryStatus"]
-                print "Device Class  - %s" % contents["deviceClass"]
-                print "Device Model  - %s" % contents["deviceModel"]
+                print("-"*30)
+                print("Name - %s" % contents["name"])
+                print("Display Name  - %s" % contents["deviceDisplayName"])
+                print("Location      - %s" % contents["location"])
+                print("Battery Level - %s" % contents["batteryLevel"])
+                print("Battery Status- %s" % contents["batteryStatus"])
+                print("Device Class  - %s" % contents["deviceClass"])
+                print("Device Model  - %s" % contents["deviceModel"])
 
             #   Play a Sound on a device
             if command_line.sound:
diff --git a/pyicloud/services/calendar.py b/pyicloud/services/calendar.py
index 2ad4434..a60acbf 100644
--- a/pyicloud/services/calendar.py
+++ b/pyicloud/services/calendar.py
@@ -1,7 +1,9 @@
 from __future__ import absolute_import
-import os
-from datetime import datetime
+from datetime import datetime, timedelta
 from calendar import monthrange
+import time
+
+import pytz
 
 
 class CalendarService(object):
@@ -18,12 +20,37 @@ class CalendarService(object):
             self._calendar_endpoint,
         )
 
+    def get_all_possible_timezones_of_local_machine(self):
+        """
+        Return all possible timezones in Olson TZ notation
+        This has been taken from
+        http://stackoverflow.com/questions/7669938
+        """
+        local_names = []
+        if time.daylight:
+            local_offset = time.altzone
+            localtz = time.tzname[1]
+        else:
+            local_offset = time.timezone
+            localtz = time.tzname[0]
+
+        local_offset = timedelta(seconds=-local_offset)
+
+        for name in pytz.all_timezones:
+            timezone = pytz.timezone(name)
+            if not hasattr(timezone, '_tzinfos'):
+                continue
+            for (utcoffset, daylight, tzname), _ in timezone._tzinfos.items():
+                if utcoffset == local_offset and tzname == localtz:
+                    local_names.append(name)
+        return local_names
+
     def get_system_tz(self):
         """
-        Retrieves the system's timezone.
-        From: http://stackoverflow.com/a/7841417
+        Retrieves the system's timezone from a list of possible options.
+        Just take the first one
         """
-        return '/'.join(os.readlink('/etc/localtime').split('/')[-2:])
+        return self.get_possible_timezones()[0]
 
     def get_event_detail(self, pguid, guid):
         """
diff --git a/requirements.txt b/requirements.txt
index ed7dc8f..6b77c7d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 requests>=1.2
 six
+pytz