refactor: use system locale for date formatting

common/src/main/java/net/william278/husksync/command/EnderChestCommand.java

@@ -30,6 +30,7 @@ import net.william278.husksync.user.User;
 import org.jetbrains.annotations.NotNull;
 
 import java.time.format.DateTimeFormatter;
+import java.time.format.FormatStyle;
 import java.util.List;
 import java.util.Optional;
 
@@ -51,7 +52,8 @@ public class EnderChestCommand extends ItemsCommand {
 
         // Display opening message
         plugin.getLocales().getLocale("ender_chest_viewer_opened", user.getUsername(),
-                        snapshot.getTimestamp().format(DateTimeFormatter.ofPattern("dd/MM/yyyy, HH:mm")))
+                        snapshot.getTimestamp().format(DateTimeFormatter
+                                .ofLocalizedDateTime(FormatStyle.MEDIUM, FormatStyle.SHORT)))
                 .ifPresent(viewer::sendMessage);
 
         // Show GUI

common/src/main/java/net/william278/husksync/command/InventoryCommand.java

@@ -30,6 +30,7 @@ import net.william278.husksync.user.User;
 import org.jetbrains.annotations.NotNull;
 
 import java.time.format.DateTimeFormatter;
+import java.time.format.FormatStyle;
 import java.util.List;
 import java.util.Optional;
 
@@ -51,7 +52,8 @@ public class InventoryCommand extends ItemsCommand {
 
         // Display opening message
         plugin.getLocales().getLocale("inventory_viewer_opened", user.getUsername(),
-                        snapshot.getTimestamp().format(DateTimeFormatter.ofPattern("dd/MM/yyyy, HH:mm")))
+                        snapshot.getTimestamp().format(DateTimeFormatter
+                                .ofLocalizedDateTime(FormatStyle.MEDIUM, FormatStyle.SHORT)))
                 .ifPresent(viewer::sendMessage);
 
         // Show GUI

common/src/main/java/net/william278/husksync/util/DataSnapshotList.java

@@ -27,6 +27,7 @@ import net.william278.paginedown.PaginatedList;
 import org.jetbrains.annotations.NotNull;
 
 import java.time.format.DateTimeFormatter;
+import java.time.format.FormatStyle;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicInteger;
 
@@ -53,9 +54,9 @@ public class DataSnapshotList {
                                         snapshot.getShortId(),
                                         snapshot.isPinned() ? "※" : "  ",
                                         snapshot.getTimestamp().format(DateTimeFormatter
-                                                .ofPattern("dd/MM/yyyy, HH:mm")),
+                                                .ofLocalizedDateTime(FormatStyle.MEDIUM, FormatStyle.SHORT)),
                                         snapshot.getTimestamp().format(DateTimeFormatter
-                                                .ofPattern("MMM dd yyyy, HH:mm:ss.SSS")),
+                                                .ofLocalizedDateTime(FormatStyle.LONG, FormatStyle.LONG)),
                                         snapshot.getSaveCause().getLocale(plugin),
                                         String.format("%.2fKiB", snapshot.getFileSize(plugin) / 1024f))
                                 .orElse("• " + snapshot.getId())).toList(),

common/src/main/java/net/william278/husksync/util/DataSnapshotOverview.java

@@ -28,6 +28,7 @@ import net.william278.husksync.user.User;
 import org.jetbrains.annotations.NotNull;
 
 import java.time.format.DateTimeFormatter;
+import java.time.format.FormatStyle;
 import java.util.List;
 import java.util.Locale;
 import java.util.Optional;
@@ -61,7 +62,8 @@ public class DataSnapshotOverview {
                         dataOwner.getUsername(), dataOwner.getUuid().toString())
                 .ifPresent(user::sendMessage);
         locales.getLocale("data_manager_timestamp",
-                        snapshot.getTimestamp().format(DateTimeFormatter.ofPattern("MMM dd yyyy, HH:mm:ss.SSS")),
+                        snapshot.getTimestamp().format(DateTimeFormatter
+                                .ofLocalizedDateTime(FormatStyle.MEDIUM, FormatStyle.LONG)),
                         snapshot.getTimestamp().toString())
                 .ifPresent(user::sendMessage);
         if (snapshot.isPinned()) {