diff --git a/osxphotos/exif_datetime_updater.py b/osxphotos/exif_datetime_updater.py
index 0671ff24..949c46cd 100644
--- a/osxphotos/exif_datetime_updater.py
+++ b/osxphotos/exif_datetime_updater.py
@@ -178,7 +178,7 @@ def update_photos_from_exif(
             )
             return None
 
-        if dtinfo.offset_seconds:
+        if dtinfo.offset_seconds is not None:
             # update timezone then update date/time
             timezone = Timezone(dtinfo.offset_seconds)
             tzupdater = PhotoTimeZoneUpdater(
diff --git a/osxphotos/exifutils.py b/osxphotos/exifutils.py
index c1bd0e7f..b91c0a52 100644
--- a/osxphotos/exifutils.py
+++ b/osxphotos/exifutils.py
@@ -97,7 +97,7 @@ def get_exif_date_time_offset(
 
     # try to get offset from EXIF:OffsetTimeOriginal
     offset = exif.get("EXIF:OffsetTimeOriginal") or exif.get("OffsetTimeOriginal")
-    if dt and not offset:
+    if dt and offset is None:
         # see if offset set in the dt string
         for pattern in (
             r"\d{4}:\d{2}:\d{2}\s\d{2}:\d{2}:\d{2}([+-]\d{2}:\d{2})",
@@ -119,10 +119,10 @@ def get_exif_date_time_offset(
                 dt = f"{matched.group(1)} 00:00:00"
                 default_time = True
 
-    offset_seconds = exif_offset_to_seconds(offset) if offset else None
+    offset_seconds = exif_offset_to_seconds(offset) if offset is not None else None
 
     if dt:
-        if offset:
+        if offset is not None:
             # drop offset from dt string and add it back on in datetime %z format
             dt = re.sub(r"[+-]\d{2}:\d{2}$", "", dt)
             dt = re.sub(r"\.\d+$", "", dt)