--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/django/utils/tzinfo.py	Fri Jul 18 18:22:23 2008 +0000
@@ -0,0 +1,69 @@
+"Implementation of tzinfo classes for use with datetime.datetime."
+
+import locale
+import time
+from datetime import timedelta, tzinfo
+from django.utils.encoding import smart_unicode
+
+try:
+    DEFAULT_ENCODING = locale.getdefaultlocale()[1] or 'ascii'
+except:
+    # Any problems at all determining the locale and we fallback. See #5846.
+    DEFAULT_ENCODING = 'ascii'
+
+class FixedOffset(tzinfo):
+    "Fixed offset in minutes east from UTC."
+    def __init__(self, offset):
+        self.__offset = timedelta(minutes=offset)
+        self.__name = u"%+03d%02d" % (offset // 60, offset % 60)
+
+    def __repr__(self):
+        return self.__name
+
+    def utcoffset(self, dt):
+        return self.__offset
+
+    def tzname(self, dt):
+        return self.__name
+
+    def dst(self, dt):
+        return timedelta(0)
+
+class LocalTimezone(tzinfo):
+    "Proxy timezone information from time module."
+    def __init__(self, dt):
+        tzinfo.__init__(self, dt)
+        self._tzname = self.tzname(dt)
+
+    def __repr__(self):
+        return self._tzname
+
+    def utcoffset(self, dt):
+        if self._isdst(dt):
+            return timedelta(seconds=-time.altzone)
+        else:
+            return timedelta(seconds=-time.timezone)
+
+    def dst(self, dt):
+        if self._isdst(dt):
+            return timedelta(seconds=-time.altzone) - timedelta(seconds=-time.timezone)
+        else:
+            return timedelta(0)
+
+    def tzname(self, dt):
+        try:
+            return smart_unicode(time.tzname[self._isdst(dt)], DEFAULT_ENCODING)
+        except UnicodeDecodeError:
+            return None
+
+    def _isdst(self, dt):
+        tt = (dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second, dt.weekday(), 0, -1)
+        try:
+            stamp = time.mktime(tt)
+        except OverflowError:
+            # 32 bit systems can't handle dates after Jan 2038, so we fake it
+            # in that case (since we only care about the DST flag here).
+            tt = (2037,) + tt[1:]
+            stamp = time.mktime(tt)
+        tt = time.localtime(stamp)
+        return tt.tm_isdst > 0