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 c696fc0c3..80ce668d4 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
@@ -626,7 +626,7 @@ public class CalendarUtil {
 	}
 
 	/**
-	 * 计算相对于dateToCompare的年龄，长用于计算指定生日在某年的年龄
+	 * 计算相对于dateToCompare的年龄，常用于计算指定生日在某年的年龄
 	 *
 	 * @param birthday      生日
 	 * @param dateToCompare 需要对比的日期
@@ -649,12 +649,16 @@ public class CalendarUtil {
 		int age = year - cal.get(Calendar.YEAR);
 
 		final int monthBirth = cal.get(Calendar.MONTH);
-		if (month == monthBirth) {
+
+		//当前日期，则为0岁
+		if (age == 0){
+			return 0;
+		} else 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) {
-				// 如果生日在当月，但是未达到生日当天的日期，年龄减一
+			if ((false == isLastDayOfMonth || false == isLastDayOfMonthBirth) && dayOfMonth <= dayOfMonthBirth) {
+				// 如果生日在当月，但是未超过生日当天的日期，年龄减一
 				age--;
 			}
 		} else if (month < monthBirth) {
diff --git a/hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java b/hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java
index f0fa65ab5..e7df01330 100755
--- a/hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java
@@ -1795,7 +1795,7 @@ public class DateUtil extends CalendarUtil {
 	}
 
 	/**
-	 * 计算相对于dateToCompare的年龄，长用于计算指定生日在某年的年龄
+	 * 计算相对于dateToCompare的年龄，常用于计算指定生日在某年的年龄
 	 *
 	 * @param birthday      生日
 	 * @param dateToCompare 需要对比的日期
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 b406c2fe6..8472d077e 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
@@ -1130,4 +1130,16 @@ public class DateUtilTest {
 		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 ageOfNowTest() {
+		DateTime concurrentDate = DateUtil.date();
+		DateTime birthDay = DateUtil.offset(concurrentDate, DateField.YEAR, -71);
+		Assert.assertEquals(70, DateUtil.ageOfNow(birthDay));
+		Assert.assertEquals(71, DateUtil.ageOfNow(DateUtil.offsetDay(birthDay, -1)));
+		Assert.assertEquals(0, DateUtil.ageOfNow(concurrentDate));
+	}
+
 }