diff --git a/build.properties b/build.properties
index 3b153d0..6d6c4f2 100644
--- a/build.properties
+++ b/build.properties
@@ -29,4 +29,4 @@
 icu4j.plugin.impl.version.string=4.2.1
 copyright.eclipse=Licensed Materials - Property of IBM \n (C) Copyright IBM Corp. 2000, 2010. All Rights Reserved. \n IBM is a registered trademark of IBM Corp.
 
-icu4j.eclipse.build.version.string=4.2.1.v20100212
+icu4j.eclipse.build.version.string=4.2.1.v20100408
diff --git a/readme.html b/readme.html
index 596d77b..202aece 100644
--- a/readme.html
+++ b/readme.html
@@ -15,8 +15,8 @@
 <h2>International Components for Unicode for Java (ICU4J)</h2>
 <h3>Read Me for ICU4J 4.2.1.1</h3>
 <hr size="2" width="100%">
-<p><b>Release Date</b><br>
-February 12, 2010<br>
+<p><b>Date</b><br>
+April 8, 2010<br>
 </p>
 <!-- <p><b>Note:</b> This is major release of ICU4J.  It contains bug fixes
 and adds implementations of inherited API and introduces new API
@@ -140,10 +140,10 @@
 <a href="http://source.icu-project.org/repos/icu/icu4j/tags/release-4-2/APIChangeReport.html">here</a>.
 </p>
 
-<h4 class="doc">Summary of changes in 4.2.1.1 (February 12, 2010)</h4>
+<h4 class="doc">Summary of changes in 4.2.1.1 (April 8, 2010)</h4>
 <p><b>Time zone data update</b></p>
 <p>ICU4J 4.2.1.1 updates the time zone data to version
-<a href="http://source.icu-project.org/repos/icu/data/trunk/tzdata/icu/2010b/">2010b</a>
+<a href="http://source.icu-project.org/repos/icu/data/trunk/tzdata/icu/2010h/">2010h</a>
 from the Olson tz database.</p>
 
 <p><b>Bug fixes</b></p>
diff --git a/src/com/ibm/icu/dev/eclipse/misc/about_icu.html b/src/com/ibm/icu/dev/eclipse/misc/about_icu.html
index 9175621..03aa08e 100644
--- a/src/com/ibm/icu/dev/eclipse/misc/about_icu.html
+++ b/src/com/ibm/icu/dev/eclipse/misc/about_icu.html
@@ -8,7 +8,7 @@
 <body lang="EN-US">
 <h2>About This Content</h2>
  
-<p>February 12, 2010</p>	
+<p>April 8, 2010</p>	
 <h3>License</h3>
 
 <p>The Eclipse Foundation makes available all content in this plug-in (&quot;Content&quot;).  Unless otherwise 
@@ -31,7 +31,7 @@
 		for informational purposes only, and you should look to the Redistributor's license for 
 		terms and conditions of use.</p>
 
-		<p><strong>ICU4J 4.2.1.v20100212 plug-in</strong> <br/><br/>
+		<p><strong>ICU4J 4.2.1.v20100408 plug-in</strong> <br/><br/>
 		The plug-in includes software (&quot;ICU4J&quot;) developed by International Business Machines
 		Corporation and others.
 		<br/><br/>
diff --git a/src/com/ibm/icu/dev/eclipse/misc/about_icu_base.html b/src/com/ibm/icu/dev/eclipse/misc/about_icu_base.html
index 94c21e1..4183976 100644
--- a/src/com/ibm/icu/dev/eclipse/misc/about_icu_base.html
+++ b/src/com/ibm/icu/dev/eclipse/misc/about_icu_base.html
@@ -8,7 +8,7 @@
 <body lang="EN-US">
 <h2>About This Content</h2>
  
-<p>February 12, 2010</p>
+<p>April 8, 2010</p>
 <h3>License</h3>
 
 <p>The Eclipse Foundation makes available all content in this plug-in (&quot;Content&quot;).  Unless otherwise 
@@ -31,7 +31,7 @@
 		for informational purposes only, and you should look to the Redistributor's license for 
 		terms and conditions of use.</p>
 
-		<p><strong>ICU4J 4.2.1.v20100212 base plug-in</strong> <br/><br/>
+		<p><strong>ICU4J 4.2.1.v20100408 base plug-in</strong> <br/><br/>
 		The plug-in includes software (&quot;ICU4J&quot;) developed by International Business Machines
 		Corporation and others.
 		<br/><br/>