diff --git a/README.md b/README.md
index 7c9ce0c..07d2487 100644
--- a/README.md
+++ b/README.md
@@ -114,7 +114,7 @@
 
 ## 日期, 如: 2000-01-01或2000-1-1
 ```javascript
-/^\d{4}(-)([0-1][0-2]|\d)\1([0-2]\d|\d|30|31)$/
+/^\d{4}(-)(1[0-2]|0?\d)\1([0-2]\d|\d|30|31)$/
 ```
 
 ## email地址
diff --git a/src/RULES.js b/src/RULES.js
index 6df0496..d0c8111 100644
--- a/src/RULES.js
+++ b/src/RULES.js
@@ -111,8 +111,8 @@ module.exports = [{
     },
     {
         title: '日期, 如: 2000-01-01或2000-1-1',
-        rule: /^\d{4}(-)([0-1][0-2]|\d)\1([0-2]\d|\d|30|31)$/,
-        example: '如: 1990-12-12、2020-01-01'
+        rule: /^\d{4}(-)(1[0-2]|0?\d)\1([0-2]\d|\d|30|31)$/,
+        example: '如: 1990-12-12、2020-1-1'
     },
     {
         title: 'email地址',