Fix ui text end time variables

The filter expects local time and it was supplied an UTC time.
Splitting date / time needs to be done after local time conversion.

kirppu/views/ui_text_utils.py

@@ -1,35 +1,46 @@
 import datetime
 import typing
 
+from django.conf import settings
 from django.template import defaultfilters
+from django.utils.timezone import localtime, is_naive
 
 
 Lazy = typing.Callable[[str | None], str] | str
 
 
+def _convert_localtime(value: datetime.datetime) -> datetime.datetime:
+    if settings.USE_TZ and not is_naive(value):
+        return localtime(value)
+    return value
+
+
 def _datetime(value: datetime.datetime | None) -> Lazy:
     def wrapped(fmt: str = "SHORT_DATETIME_FORMAT") -> str:
         if value is None:
             return ""
-        return defaultfilters.date(value, fmt)
+        local_value = _convert_localtime(value)
+        return defaultfilters.date(local_value, fmt)
 
     return wrapped
 
 
-def _date(value: datetime.date | None) -> Lazy:
+def _date(value: datetime.datetime | None) -> Lazy:
     def wrapped(fmt: str = "SHORT_DATE_FORMAT") -> str:
         if value is None:
             return ""
-        return defaultfilters.date(value, fmt)
+        local_value = _convert_localtime(value)
+        return defaultfilters.date(local_value.date(), fmt)
 
     return wrapped
 
 
-def _time(value: datetime.time | None) -> Lazy:
+def _time(value: datetime.datetime | None) -> Lazy:
     def wrapped(fmt: str = None) -> str:
         if value is None:
             return ""
-        return defaultfilters.time(value, fmt)
+        local_value = _convert_localtime(value)
+        return defaultfilters.time(local_value.time(), fmt)
 
     return wrapped
 
@@ -41,10 +52,10 @@ def ui_text_vars(event) -> dict[str, typing.Any]:
         "event.end.date": _date(event.end_date),
         "event.homepage": event.home_page,
         "registration.end.datetime": _datetime(event.registration_end),
-        "registration.end.date": _date(event.registration_end.date())
+        "registration.end.date": _date(event.registration_end)
         if event.registration_end
         else "",
-        "registration.end.time": _time(event.registration_end.time())
+        "registration.end.time": _time(event.registration_end)
         if event.registration_end
         else "",
     }