Index: applications/editors/josm/plugins/MicrosoftStreetside/src/org/openstreetmap/josm/plugins/streetside/io/download/SequenceDownloadRunnable.java
===================================================================
--- applications/editors/josm/plugins/MicrosoftStreetside/src/org/openstreetmap/josm/plugins/streetside/io/download/SequenceDownloadRunnable.java	(revision 36262)
+++ applications/editors/josm/plugins/MicrosoftStreetside/src/org/openstreetmap/josm/plugins/streetside/io/download/SequenceDownloadRunnable.java	(revision 36263)
@@ -13,4 +13,5 @@
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Locale;
 import java.util.Objects;
 import java.util.concurrent.Callable;
@@ -149,9 +150,9 @@
                 final var vintageStart = LocalDate
                         .parse(node.getString("vintageStart").replace("GMT", "UTC"),
-                                DateTimeFormatter.ofPattern("dd LLL yyyy zzz"))
+                                DateTimeFormatter.ofPattern("dd LLL yyyy zzz", Locale.ROOT))
                         .atStartOfDay().toInstant(ZoneOffset.UTC);
                 final var vintageEnd = LocalDate
                         .parse(node.getString("vintageStart").replace("GMT", "UTC"),
-                                DateTimeFormatter.ofPattern("dd LLL yyyy zzz"))
+                                DateTimeFormatter.ofPattern("dd LLL yyyy zzz", Locale.ROOT))
                         .atTime(LocalTime.MAX).toInstant(ZoneOffset.UTC);
                 final List<String> imageUrlSubdomains = node.getJsonArray("imageUrlSubdomains")