diff --git a/src/documentation/content/xdocs/changes.xml b/src/documentation/content/xdocs/changes.xml
index 3e37911e8..caa238df5 100644
--- a/src/documentation/content/xdocs/changes.xml
+++ b/src/documentation/content/xdocs/changes.xml
@@ -37,6 +37,7 @@
 
 		<!-- Don't forget to update status.xml too! -->
         <release version="3.1.1-alpha1" date="2008-??-??">
+           <action dev="POI-DEVELOPERS" type="fix">45398 - Support detecting date formats containing "am/pm" as date times</action>
            <action dev="POI-DEVELOPERS" type="fix">45410 - Removed dependency from contrib on commons beanutils,collections and lang</action>
            <action dev="POI-DEVELOPERS" type="add">New helper, HSSFOptimiser, which handles removing duplicated font and style records, to avoid going over the limits in Excel</action>
            <action dev="POI-DEVELOPERS" type="fix">45322 - Fixed NPE in HSSFSheet.autoSizeColumn() when cell number format was not found</action>
diff --git a/src/documentation/content/xdocs/status.xml b/src/documentation/content/xdocs/status.xml
index 511b570a2..798d35829 100644
--- a/src/documentation/content/xdocs/status.xml
+++ b/src/documentation/content/xdocs/status.xml
@@ -34,6 +34,7 @@
 	<!-- Don't forget to update changes.xml too! -->
     <changes>
         <release version="3.1.1-alpha1" date="2008-??-??">
+           <action dev="POI-DEVELOPERS" type="fix">45398 - Support detecting date formats containing "am/pm" as date times</action>
            <action dev="POI-DEVELOPERS" type="fix">45410 - Removed dependency from contrib on commons beanutils,collections and lang</action>
            <action dev="POI-DEVELOPERS" type="add">New helper, HSSFOptimiser, which handles removing duplicated font and style records, to avoid going over the limits in Excel</action>
            <action dev="POI-DEVELOPERS" type="fix">45322 - Fixed NPE in HSSFSheet.autoSizeColumn() when cell number format was not found</action>
diff --git a/src/java/org/apache/poi/hssf/usermodel/HSSFDateUtil.java b/src/java/org/apache/poi/hssf/usermodel/HSSFDateUtil.java
index be590c3a2..ab353ca02 100644
--- a/src/java/org/apache/poi/hssf/usermodel/HSSFDateUtil.java
+++ b/src/java/org/apache/poi/hssf/usermodel/HSSFDateUtil.java
@@ -231,7 +231,7 @@ public class HSSFDateUtil
     	// Otherwise, check it's only made up, in any case, of:
     	//  y m d h s - / , . :
     	// optionally followed by AM/PM
-    	if(fs.matches("^[yYmMdDhHsS\\-/,. :]+[ampAMP]*$")) {
+    	if(fs.matches("^[yYmMdDhHsS\\-/,. :]+[ampAMP/]*$")) {
     		return true;
     	}
     	
diff --git a/src/testcases/org/apache/poi/hssf/usermodel/TestHSSFDateUtil.java b/src/testcases/org/apache/poi/hssf/usermodel/TestHSSFDateUtil.java
index 2ac4eb825..894c77d68 100644
--- a/src/testcases/org/apache/poi/hssf/usermodel/TestHSSFDateUtil.java
+++ b/src/testcases/org/apache/poi/hssf/usermodel/TestHSSFDateUtil.java
@@ -273,7 +273,8 @@ public class TestHSSFDateUtil extends TestCase {
                 "yyyy-mm-dd hh:mm:ss", "yyyy/mm/dd HH:MM:SS", 
                 "mm/dd HH:MM", "yy/mmm/dd SS",
                 "mm/dd HH:MM AM", "mm/dd HH:MM am",
-                "mm/dd HH:MM PM", "mm/dd HH:MM pm" 
+                "mm/dd HH:MM PM", "mm/dd HH:MM pm",
+                "m/d/yy h:mm AM/PM"
         };
         for(int i=0; i<formats.length; i++) {
             assertTrue(