From 871af59add431cf13bcff6c74601bb12fc004c27 Mon Sep 17 00:00:00 2001
From: Nicco Kunzmann <niccokunzmann@rambler.ru>
Date: Fri, 21 Jun 2024 18:27:24 +0100
Subject: [PATCH 1/2] Remove unused and untested code

---
 src/icalendar/__init__.py |  5 ----
 src/icalendar/prop.py     | 59 ---------------------------------------
 2 files changed, 64 deletions(-)

diff --git a/src/icalendar/__init__.py b/src/icalendar/__init__.py
index 8b7203d6..138cf7a6 100644
--- a/src/icalendar/__init__.py
+++ b/src/icalendar/__init__.py
@@ -34,11 +34,6 @@
     vUTCOffset,
     TypesFactory,
 )
-# useful tzinfo subclasses
-from icalendar.prop import (
-    FixedOffset,
-    LocalTimezone,
-)
 # Parameters and helper methods for splitting and joining string with escaped
 # chars.
 from icalendar.parser import (
diff --git a/src/icalendar/prop.py b/src/icalendar/prop.py
index 2ae5590d..61473219 100644
--- a/src/icalendar/prop.py
+++ b/src/icalendar/prop.py
@@ -40,12 +40,6 @@
 from datetime import time
 from datetime import timedelta
 from datetime import tzinfo
-
-try:
-    from dateutil.tz import tzutc
-except ImportError:
-    tzutc = None
-
 from icalendar.caselessdict import CaselessDict
 from icalendar.parser import Parameters
 from icalendar.parser import escape_char
@@ -70,19 +64,6 @@
 WEEKDAY_RULE = re.compile(r'(?P<signal>[+-]?)(?P<relative>[\d]{0,2})'
                           r'(?P<weekday>[\w]{2})$')
 
-####################################################
-# handy tzinfo classes you can use.
-#
-
-ZERO = timedelta(0)
-HOUR = timedelta(hours=1)
-STDOFFSET = timedelta(seconds=-_time.timezone)
-if _time.daylight:
-    DSTOFFSET = timedelta(seconds=-_time.altzone)
-else:
-    DSTOFFSET = STDOFFSET
-DSTDIFF = DSTOFFSET - STDOFFSET
-
 
 def tzid_from_dt(dt: datetime) -> Optional[str]:
     """Retrieve the timezone id from the datetime object."""
@@ -98,46 +79,6 @@ def tzid_from_dt(dt: datetime) -> Optional[str]:
     return tzid
 
 
-class FixedOffset(tzinfo):
-    """Fixed offset in minutes east from UTC.
-    """
-
-    def __init__(self, offset, name):
-        self.__offset = timedelta(minutes=offset)
-        self.__name = name
-
-    def utcoffset(self, dt):
-        return self.__offset
-
-    def tzname(self, dt):
-        return self.__name
-
-    def dst(self, dt):
-        return ZERO
-
-
-class LocalTimezone(tzinfo):
-    """Timezone of the machine where the code is running.
-    """
-
-    def utcoffset(self, dt):
-        return DSTOFFSET if self._isdst(dt) else STDOFFSET
-
-    def dst(self, dt):
-        return DSTDIFF if self._isdst(dt) else ZERO
-
-    def tzname(self, dt):
-        return _time.tzname[self._isdst(dt)]
-
-    def _isdst(self, dt):
-        tt = (dt.year, dt.month, dt.day,
-              dt.hour, dt.minute, dt.second,
-              dt.weekday(), 0, -1)
-        stamp = _time.mktime(tt)
-        tt = _time.localtime(stamp)
-        return tt.tm_isdst > 0
-
-
 class vBinary:
     """Binary property values are base 64 encoded.
     """

From 417c6fb88380715682334279b162ce2916fb414a Mon Sep 17 00:00:00 2001
From: Nicco Kunzmann <niccokunzmann@rambler.ru>
Date: Fri, 21 Jun 2024 18:30:12 +0100
Subject: [PATCH 2/2] Log changes

---
 CHANGES.rst | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/CHANGES.rst b/CHANGES.rst
index 92b2fc87..2d2fa66d 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -33,6 +33,8 @@ Breaking changes:
 
 - Replaced ``pkg_resources.get_distribution`` with ``importlib.metadata`` in
   ``docs/conf.py`` to allow building docs on Python 3.12.
+- Remove untested and broken ``LocalTimezone`` and ``FixedOffset`` tzinfo
+  sub-classes, see `Issue 67 <https://github.com/collective/icalendar/issues/67>`_
 
 New features: