diff --git a/hutool-core/src/main/java/cn/hutool/core/date/CalendarUtil.java b/hutool-core/src/main/java/cn/hutool/core/date/CalendarUtil.java
index 7efc1e32f..efec80bd6 100644
--- a/hutool-core/src/main/java/cn/hutool/core/date/CalendarUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/date/CalendarUtil.java
@@ -659,13 +659,18 @@ public class CalendarUtil {
 
 		cal.setTimeInMillis(birthday);
 		int age = year - cal.get(Calendar.YEAR);
+		//当前日期，则为0岁
+		if (age == 0){
+			return 0;
+		}
 
 		final int monthBirth = cal.get(Calendar.MONTH);
 		if (month == monthBirth) {
 
 			final int dayOfMonthBirth = cal.get(Calendar.DAY_OF_MONTH);
 			final boolean isLastDayOfMonthBirth = dayOfMonthBirth == cal.getActualMaximum(Calendar.DAY_OF_MONTH);
-			if ((false == isLastDayOfMonth || false == isLastDayOfMonthBirth) && dayOfMonth < dayOfMonthBirth) {
+			// issue#I6E6ZG，法定生日当天不算年龄，从第二天开始计算
+			if ((false == isLastDayOfMonth || false == isLastDayOfMonthBirth) && dayOfMonth <= dayOfMonthBirth) {
 				// 如果生日在当月，但是未达到生日当天的日期，年龄减一
 				age--;
 			}
diff --git a/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java
index eb874c6c3..9d2bafeff 100755
--- a/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java
@@ -1100,4 +1100,15 @@ public class DateUtilTest {
 		Assert.assertNotNull(dateTime3);
 		Assert.assertEquals("2021-03-17 06:31:33", dateTime3.toString());
 	}
+
+	/**
+	 * issue#I6E6ZG 法定年龄/周岁/实岁计算
+	 */
+	@Test
+	public void issueI6E6ZGTest() {
+		// issue#I6E6ZG，法定生日当天不算年龄，从第二天开始计算
+		Assert.assertEquals(70, DateUtil.age(DateUtil.parse("1952-02-14"), DateUtil.parse("2023-02-14")));
+		Assert.assertEquals(71, DateUtil.age(DateUtil.parse("1952-02-13"), DateUtil.parse("2023-02-14")));
+		Assert.assertEquals(0, DateUtil.age(DateUtil.parse("2023-02-14"), DateUtil.parse("2023-02-14")));
+	}
 }