diff --git a/src/core/func/alias.js b/src/core/func/alias.js
index 0dca26ca6..2884e492b 100644
--- a/src/core/func/alias.js
+++ b/src/core/func/alias.js
@@ -815,7 +815,7 @@
                     break;
                 case "M": // 月
                     if (len > 2) {
-                        str = BI.Date._MN[date.getMonth()];
+                        str = BI.getMonthName(date.getMonth());
                     } else if (len < 2) {
                         str = date.getMonth() + 1;
                     } else {