Updated date methods to use named timezone instead of offset

Author: RhetTbull

osxphotos/photosdb/photosdb.py

@@ -2077,7 +2077,10 @@ def _process_database5(self):
             info["imageTimeZoneName"] = row[8]
             info["imageDate_timestamp"] = row[5]
             info["imageDate"] = photos_datetime(
-                row[5], info["imageTimeZoneOffsetSeconds"] or 0, default=True
+                timestamp=row[5],
+                tzoffset=info["imageTimeZoneOffsetSeconds"] or 0,
+                tzname=info["imageTimeZoneName"],
+                default=True,
             )
             info["hidden"] = row[9]
             info["favorite"] = row[10]

osxphotos/timezones.py

@@ -31,7 +31,9 @@ def __init__(self, tz: Union[str, int]):
 
     def known_timezone_names() -> list[str]:
         """Get list of valid timezones on macOS"""
-        return sorted(list(Foundation.NSTimeZone.knownTimeZoneNames()))
+        # sort by shortest length then alphabetically
+        timezones = list(Foundation.NSTimeZone.knownTimeZoneNames())
+        return sorted(timezones, key=lambda x: (len(x), x))
 
     class Timezone:
         """Create Timezone object from either name (str) or offset from GMT (int)"""
@@ -40,7 +42,10 @@ def __init__(self, tz: Union[str, int]):
             with objc.autorelease_pool():
                 self._from_offset = False
                 if isinstance(tz, str):
-                    self.timezone = Foundation.NSTimeZone.timeZoneWithName_(tz)
+                    # the NSTimeZone methods return nil if the timezone is invalid
+                    self.timezone = Foundation.NSTimeZone.timeZoneWithAbbreviation_(
+                        tz
+                    ) or Foundation.NSTimeZone.timeZoneWithName_(tz)
                     if not self.timezone:
                         raise ValueError(f"Invalid timezone: {tz}")
                 elif isinstance(tz, int):