diff --git a/packages/www/src/RULES.js b/packages/www/src/RULES.js
index b8317e7..3f3b51f 100644
--- a/packages/www/src/RULES.js
+++ b/packages/www/src/RULES.js
@@ -194,11 +194,19 @@ module.exports = [{
     examples: ['008618311006933', '+8617888829981', '19119255642']
 },
 {
-    title: 'date(日期)',
+    title: '日期(宽松)',
     rule: /^\d{1,4}(-)(1[0-2]|0?[1-9])\1(0?[1-9]|[1-2]\d|30|31)$/,
     examples: ['1990-12-12', '1-1-1', '0000-1-1'],
     counterExamples: ['2020-00-01']
 },
+
+{
+    title: '日期(严谨, 支持闰年判断)',
+    rule: /^(([0-9]{3}[1-9]|[0-9]{2}[1-9][0-9]{1}|[0-9]{1}[1-9][0-9]{2}|[1-9][0-9]{3})-(((0[13578]|1[02])-(0[1-9]|[12][0-9]|3[01]))|((0[469]|11)-(0[1-9]|[12][0-9]|30))|(02-(0[1-9]|[1][0-9]|2[0-8]))))|((([0-9]{2})(0[48]|[2468][048]|[13579][26])|((0[48]|[2468][048]|[3579][26])00))-02-29)$/,
+    examples: ['1990-12-12', '2000-02-29'],
+    counterExamples: ['2021-02-29']
+},
+
 {
     title: '可以被moment转化成功的时间 YYYYMMDD HH:mm:ss',
     rule: /^\d{4}([/:-\S])(1[0-2]|0?[1-9])\1(0?[1-9]|[1-2]\d|30|31) (?:[01]\d|2[0-3]):[0-5]\d:[0-5]\d$/,