fix bug

.idea/workspace.xml

@@ -10,7 +10,7 @@
   </component>
   <component name="ChangeListManager">
     <list default="true" id="18463f0e-cf10-4ee2-975b-376476396e12" name="Default Changelist" comment="Default Changelist">
-      <change beforePath="$PROJECT_DIR$/lib/utils/solar_term_util.dart" beforeDir="false" afterPath="$PROJECT_DIR$/lib/utils/solar_term_util.dart" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/lib/utils/lunar_util.dart" beforeDir="false" afterPath="$PROJECT_DIR$/lib/utils/lunar_util.dart" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />

lib/utils/lunar_util.dart

@@ -1021,7 +1021,7 @@ class LunarUtil {
    * @return 获取每年的母亲节和父亲节、感恩节
    */
   static List<String?> getSpecialFestivals(int year) {
-    List<String?> festivals = [];
+    List<String?> festivals = ['','',''];
     DateTime dateTime = new DateTime(year, 5, 1);
 
     //母亲节