diff --git a/src/calibre/utils/iso8601.py b/src/calibre/utils/iso8601.py
index f91f119f09..00e6bdfc01 100644
--- a/src/calibre/utils/iso8601.py
+++ b/src/calibre/utils/iso8601.py
@@ -17,7 +17,8 @@ if not speedup:
 class SafeLocalTimeZone(tzlocal):
 
     def _isdst(self, dt):
-        # This method in tzlocal raises ValueError if dt is out of range.
+        # This method in tzlocal raises ValueError if dt is out of range (in
+        # older versions of dateutil)
         # In such cases, just assume that dt is not DST.
         try:
             return super(SafeLocalTimeZone, self)._isdst(dt)
@@ -25,6 +26,17 @@ class SafeLocalTimeZone(tzlocal):
             pass
         return False
 
+    def _naive_is_dst(self, dt):
+        # This method in tzlocal raises ValueError if dt is out of range (in
+        # newer versions of dateutil)
+        # In such cases, just assume that dt is not DST.
+        try:
+            return super(SafeLocalTimeZone, self)._naive_is_dst(dt)
+        except Exception:
+            pass
+        return False
+
+
 utc_tz = tzutc()
 local_tz = SafeLocalTimeZone()
 del tzutc, tzlocal
@@ -48,6 +60,7 @@ def parse_iso8601(date_string, assume_utc=False, as_utc=True):
         return dt
     return dt.astimezone(utc_tz if as_utc else local_tz)
 
+
 if __name__ == '__main__':
     import sys
     print(parse_iso8601(sys.argv[-1]))