Revert

src/main/java/run/halo/app/handler/file/LocalFileHandler.java

@@ -91,7 +91,7 @@ public class LocalFileHandler implements FileHandler {
         Assert.notNull(file, "Multipart file must not be null");
 
         // Get current time
-        Calendar current = Calendar.getInstance(Locale.CHINESE);
+        Calendar current = Calendar.getInstance(optionService.getLocale());
         // Get month and day of month
         int year = current.get(Calendar.YEAR);
         int month = current.get(Calendar.MONTH) + 1;

src/main/java/run/halo/app/model/properties/BlogProperties.java

@@ -6,6 +6,11 @@ package run.halo.app.model.properties;
  */
 public enum BlogProperties implements PropertyEnum {
 
+    /**
+     * Blog locale.
+     */
+    BLOG_LOCALE("blog_locale", String.class),
+
     /**
      * Blog title.
      */

src/main/java/run/halo/app/service/OptionService.java

@@ -268,4 +268,12 @@ public interface OptionService extends CrudService<Option, Integer> {
      */
     @NonNull
     Zone getQnYunZone();
+
+    /**
+     * Gets locale.
+     *
+     * @return locale user set or default locale
+     */
+    @NonNull
+    Locale getLocale();
 }

src/main/java/run/halo/app/service/impl/OptionServiceImpl.java

@@ -269,4 +269,15 @@ public class OptionServiceImpl extends AbstractCrudService<Option, Integer> impl
 
         }).orElseGet(Zone::autoZone);
     }
+
+    @Override
+    public Locale getLocale() {
+        return getByProperty(BlogProperties.BLOG_LOCALE).map(localeStr -> {
+            try {
+                return Locale.forLanguageTag(localeStr);
+            } catch (Exception e) {
+                return Locale.getDefault();
+            }
+        }).orElseGet(Locale::getDefault);
+    }
 }

src/main/java/run/halo/app/web/controller/core/InstallController.java

@@ -164,6 +164,7 @@ public class InstallController {
         // Init default properties
         Map<PropertyEnum, String> properties = new HashMap<>(11);
         properties.put(PrimaryProperties.IS_INSTALLED, Boolean.TRUE.toString());
+        properties.put(BlogProperties.BLOG_LOCALE, installParam.getLocale());
         properties.put(BlogProperties.BLOG_TITLE, installParam.getTitle());
         properties.put(BlogProperties.BLOG_URL, installParam.getUrl());
         properties.put(PrimaryProperties.THEME, DEFAULT_THEME_NAME);