diff --git a/funcext/tvclib/utslvclauxiliary.tsf b/funcext/tvclib/utslvclauxiliary.tsf
index 5445bba..e878c06 100644
--- a/funcext/tvclib/utslvclauxiliary.tsf
+++ b/funcext/tvclib/utslvclauxiliary.tsf
@@ -2175,9 +2175,21 @@ begin
     xx := array(max(xx1[0],xx2[0]),min(xx1[1],xx2[1]));
     return 1;
 end
-function getmonthdates(y,m);
+function leapyear(y); //闰年判断
+begin
+    if not(y mod 4) then 
+    begin
+        if not(y mod 100) then 
+        begin
+            return not(y mod 400);
+        end 
+        return 1;
+    end 
+    return 0;
+end 
+function getmonthdates(y,m); //获得所在月的天数
 begin    
-    if m = 2 then  return (not(y mod 4) and ( (y mod 100)))+  28;
+    if m = 2 then  return leapyear(y)+  28;
     if m in array(1,3,5,7,8,10,12) then return 31;
     return 30;  
 end