diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0042e17dd..94e5c3c1f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,7 @@
 
 -------------------------------------------------------------------------------------------------------------
 
-# 5.5.3 (2020-12-06)
+# 5.5.3 (2020-12-07)
 
 ### 新特性
 * 【core   】     IdcardUtil增加行政区划83（issue#1277@Github）
@@ -14,6 +14,9 @@
 ### Bug修复
 * 【cache  】     修复Cache中get重复misCount计数问题（issue#1281@Github）
 * 【poi    】     修复sax读取自定义格式单元格无法识别日期类型的问题（issue#1283@Github）
+* 【core   】     修复CollUtil.get越界问题（issue#1292@Github）
+* 【json   】     修复TemporalAccessorUtil无法格式化LocalDate带时间问题（issue#1289@Github）
+* 【json   】     修复自定义日期格式的LocalDateTime没有包装引号问题（issue#1289@Github）
 
 -------------------------------------------------------------------------------------------------------------
 
diff --git a/hutool-core/src/main/java/cn/hutool/core/collection/CollUtil.java b/hutool-core/src/main/java/cn/hutool/core/collection/CollUtil.java
index b56c239bd..aa73d40f5 100644
--- a/hutool-core/src/main/java/cn/hutool/core/collection/CollUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/collection/CollUtil.java
@@ -1870,7 +1870,7 @@ public class CollUtil {
 	/**
 	 * Iterator转换为Enumeration
 	 * <p>
-	 * Adapt the specified <code>Iterator</code> to the <code>Enumeration</code> interface.
+	 * Adapt the specified {@link Iterator} to the {@link Enumeration} interface.
 	 *
 	 * @param <E>  集合元素类型
 	 * @param iter {@link Iterator}
@@ -1883,7 +1883,7 @@ public class CollUtil {
 	/**
 	 * Enumeration转换为Iterator
 	 * <p>
-	 * Adapt the specified <code>Enumeration</code> to the <code>Iterator</code> interface
+	 * Adapt the specified {@code Enumeration} to the {@code Iterator} interface
 	 *
 	 * @param <E> 集合元素类型
 	 * @param e   {@link Enumeration}
@@ -2186,7 +2186,7 @@ public class CollUtil {
 		}
 
 		// 检查越界
-		if (index >= size) {
+		if (index >= size || index < 0) {
 			return null;
 		}
 
diff --git a/hutool-core/src/main/java/cn/hutool/core/date/TemporalAccessorUtil.java b/hutool-core/src/main/java/cn/hutool/core/date/TemporalAccessorUtil.java
index 3ecb8a5af..9d838f861 100644
--- a/hutool-core/src/main/java/cn/hutool/core/date/TemporalAccessorUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/date/TemporalAccessorUtil.java
@@ -13,6 +13,7 @@ import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
 import java.time.temporal.TemporalAccessor;
 import java.time.temporal.TemporalField;
+import java.time.temporal.UnsupportedTemporalTypeException;
 
 /**
  * {@link TemporalAccessor} 工具类封装
@@ -54,7 +55,19 @@ public class TemporalAccessorUtil extends TemporalUtil{
 			formatter = DateTimeFormatter.ISO_LOCAL_DATE_TIME;
 		}
 
-		return formatter.format(time);
+
+		try {
+			return formatter.format(time);
+		} catch (UnsupportedTemporalTypeException e){
+			if(time instanceof LocalDate && e.getMessage().contains("HourOfDay")){
+				// 用户传入LocalDate，但是要求格式化带有时间部分，转换为LocalDateTime重试
+				return formatter.format(((LocalDate) time).atStartOfDay());
+			}else if(time instanceof LocalTime && e.getMessage().contains("YearOfEra")){
+				// 用户传入LocalTime，但是要求格式化带有日期部分，转换为LocalDateTime重试
+				return formatter.format(((LocalTime) time).atDate(LocalDate.now()));
+			}
+			throw e;
+		}
 	}
 
 	/**
diff --git a/hutool-core/src/test/java/cn/hutool/core/date/TemporalAccessorUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/date/TemporalAccessorUtilTest.java
new file mode 100644
index 000000000..bf8501625
--- /dev/null
+++ b/hutool-core/src/test/java/cn/hutool/core/date/TemporalAccessorUtilTest.java
@@ -0,0 +1,23 @@
+package cn.hutool.core.date;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.time.LocalDate;
+import java.time.LocalTime;
+
+public class TemporalAccessorUtilTest {
+
+	@Test
+	public void formatLocalDateTest(){
+		final String format = TemporalAccessorUtil.format(LocalDate.of(2020, 12, 7), DatePattern.NORM_DATETIME_PATTERN);
+		Assert.assertEquals("2020-12-07 00:00:00", format);
+	}
+
+	@Test
+	public void formatLocalTimeTest(){
+		final String today = TemporalAccessorUtil.format(LocalDate.now(), DatePattern.NORM_DATE_PATTERN);
+		final String format = TemporalAccessorUtil.format(LocalTime.MIN, DatePattern.NORM_DATETIME_PATTERN);
+		Assert.assertEquals(today + " 00:00:00", format);
+	}
+}
diff --git a/hutool-json/src/main/java/cn/hutool/json/InternalJSONUtil.java b/hutool-json/src/main/java/cn/hutool/json/InternalJSONUtil.java
index 98e9c3264..177d97b06 100644
--- a/hutool-json/src/main/java/cn/hutool/json/InternalJSONUtil.java
+++ b/hutool-json/src/main/java/cn/hutool/json/InternalJSONUtil.java
@@ -240,11 +240,14 @@ final class InternalJSONUtil {
 	 */
 	private static String formatDate(Object dateObj, String format) {
 		if (StrUtil.isNotBlank(format)) {
+			final String dateStr;
 			if(dateObj instanceof TemporalAccessor){
-				return TemporalAccessorUtil.format((TemporalAccessor) dateObj, format);
+				dateStr = TemporalAccessorUtil.format((TemporalAccessor) dateObj, format);
+			} else{
+				dateStr = DateUtil.format(Convert.toDate(dateObj), format);
 			}
 			//用户定义了日期格式
-			return JSONUtil.quote(DateUtil.format(Convert.toDate(dateObj), format));
+			return JSONUtil.quote(dateStr);
 		}
 
 		//默认使用时间戳