Rename fix_pytz_rrule_until -> fix_rrule_until

src/icalendar/cal.py

@@ -571,7 +571,7 @@ class Timezone(Component):
 
             rrulestr = component['RRULE'].to_ical().decode('utf-8')
             rrule = dateutil.rrule.rrulestr(rrulestr, dtstart=rrstart)
-            tzp.fix_pytz_rrule_until(rrule, component)
+            tzp.fix_rrule_until(rrule, component)
 
             # constructing the timezone requires UTC transition times.
             # here we construct local times without tzinfo, the offset to UTC

src/icalendar/timezone/pytz.py

@@ -24,7 +24,7 @@ class PYTZ:
         """Whether the timezone is already cached by the implementation."""
         return id in pytz.all_timezones
 
-    def fix_pytz_rrule_until(self, rrule, component):
+    def fix_rrule_until(self, rrule, component):
         """Make sure the until value works."""
         if not {'UNTIL', 'COUNT'}.intersection(component['RRULE'].keys()):
             # pytz.timezones don't know any transition dates after 2038

src/icalendar/timezone/tzp.py

@@ -53,9 +53,9 @@ class TZP:
         if not self.__provider.knows_timezone_id(component['TZID']):
             self.__tz_cache.setdefault(component['TZID'], component.to_tz())
 
-    def fix_pytz_rrule_until(self, rrule, component) -> None:
+    def fix_rrule_until(self, rrule, component) -> None:
         """Make sure the until value works."""
-        self.__provider.fix_pytz_rrule_until(rrule, component)
+        self.__provider.fix_rrule_until(rrule, component)
 
     def create_timezone(self, name: str, transition_times, transition_info) -> datetime.tzinfo:
         """Create a timezone from given information."""

src/icalendar/timezone/zoneinfo.py

@@ -32,5 +32,12 @@ class ZONEINFO:
         """Whether the timezone is already cached by the implementation."""
         return id in self._available_timezones
 
+    def fix_rrule_until(self, rrule, component):
+        """Make sure the until value works."""
+        if not {'UNTIL', 'COUNT'}.intersection(component['RRULE'].keys()):
+            # zoninfo does not know any transition dates after 2038
+            rrule._until = datetime(2038, 12, 31, tzinfo=pytz.UTC)
+
+
 
 __all__ = ["ZONEINFO"]