diff --git a/reference/datetime/dateperiod.xml b/reference/datetime/dateperiod.xml
index b7011844f4..0185df2a03 100644
--- a/reference/datetime/dateperiod.xml
+++ b/reference/datetime/dateperiod.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
-<!-- EN-Revision: ac83abe55f4da019036de5ec14400d674fa3f9f5 Maintainer: takagi Status: ready -->
+<!-- EN-Revision: 576c7c43febb2eec5718d8320f92606423413983 Maintainer: takagi Status: ready -->
 <reference xml:id="class.dateperiod" role="class" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
 
  <title>DatePeriod クラス</title>
@@ -109,14 +109,20 @@
    &reftitle.constants;
    <variablelist>
     <varlistentry xml:id="dateperiod.constants.exclude-start-date">
-     <term><constant>DatePeriod::EXCLUDE_START_DATE</constant></term>
+     <term>
+      <constant>DatePeriod::EXCLUDE_START_DATE</constant>
+      <type>int</type>
+     </term>
      <listitem>
       <para>開始日を含まない。<function>DatePeriod::__construct</function> で使用します。</para>
      </listitem>
     </varlistentry>
 
     <varlistentry xml:id="dateperiod.constants.include-end-date">
-     <term><constant>DatePeriod::INCLUDE_END_DATE</constant></term>
+     <term>
+      <constant>DatePeriod::INCLUDE_END_DATE</constant>
+      <type>int</type>
+     </term>
      <listitem>
       <para>終了日を含む。<function>DatePeriod::__construct</function>
       で使用します。</para>
@@ -261,6 +267,12 @@ echo $period->recurrences, "\n";
       </row>
      </thead>
      <tbody>
+      <row>
+       <entry>8.4.0</entry>
+       <entry>
+        クラス定数が型付けされました。
+       </entry>
+      </row>
       <row>
        <entry>8.2.0</entry>
        <entry>
diff --git a/reference/datetime/datetime.xml b/reference/datetime/datetime.xml
index 3f6d5b154b..2edb99dc45 100644
--- a/reference/datetime/datetime.xml
+++ b/reference/datetime/datetime.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
-<!-- EN-Revision: 14767af0f05dffa6fdb9b49e1a1f4e9ca7022a60 Maintainer: takagi Status: ready -->
+<!-- EN-Revision: 576c7c43febb2eec5718d8320f92606423413983 Maintainer: takagi Status: ready -->
 <!-- Credits: mumumu -->
 <reference xml:id="class.datetime" role="class" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
 
@@ -81,6 +81,12 @@
       </row>
      </thead>
      <tbody>
+      <row>
+       <entry>8.4.0</entry>
+       <entry>
+        クラス定数が型付けされました。
+       </entry>
+      </row>
       <row>
        <entry>7.2.0</entry>
        <entry>
diff --git a/reference/datetime/datetimeimmutable.xml b/reference/datetime/datetimeimmutable.xml
index 0e179c8eaa..6f7c0424c8 100644
--- a/reference/datetime/datetimeimmutable.xml
+++ b/reference/datetime/datetimeimmutable.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
-<!-- EN-Revision: 14767af0f05dffa6fdb9b49e1a1f4e9ca7022a60 Maintainer: takagi Status: ready -->
+<!-- EN-Revision: 576c7c43febb2eec5718d8320f92606423413983 Maintainer: takagi Status: ready -->
 <!-- Credits: mumumu -->
 <reference xml:id="class.datetimeimmutable" role="class" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
 
@@ -71,6 +71,12 @@
       </row>
      </thead>
      <tbody>
+      <row>
+       <entry>8.4.0</entry>
+       <entry>
+        クラス定数が型付けされました。
+       </entry>
+      </row>
       <row>
        <entry>7.1.0</entry>
        <entry>
diff --git a/reference/datetime/datetimeinterface.xml b/reference/datetime/datetimeinterface.xml
index cecafd87dc..0823068e8b 100644
--- a/reference/datetime/datetimeinterface.xml
+++ b/reference/datetime/datetimeinterface.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
-<!-- EN-Revision: 9eb4a46bba05da229be4c8f7a3cb64702e1a2f95 Maintainer: takagi Status: ready -->
+<!-- EN-Revision: 576c7c43febb2eec5718d8320f92606423413983 Maintainer: takagi Status: ready -->
 <!-- Credits: mumumu -->
 <reference xml:id="class.datetimeinterface" role="class" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
 
@@ -151,7 +151,10 @@
    &reftitle.constants;
    <variablelist>
     <varlistentry xml:id="datetimeinterface.constants.atom">
-     <term><constant>DateTimeInterface::ATOM</constant></term>
+     <term>
+      <constant>DateTimeInterface::ATOM</constant>
+      <type>string</type>
+     </term>
      <term><constant>DATE_ATOM</constant></term>
      <listitem>
       <simpara>
@@ -161,7 +164,10 @@
     </varlistentry>
 
     <varlistentry xml:id="datetimeinterface.constants.cookie">
-     <term><constant>DateTimeInterface::COOKIE</constant></term>
+     <term>
+      <constant>DateTimeInterface::COOKIE</constant>
+      <type>string</type>
+     </term>
      <term><constant>DATE_COOKIE</constant></term>
      <listitem>
       <simpara>
@@ -171,7 +177,10 @@
     </varlistentry>
 
     <varlistentry xml:id="datetimeinterface.constants.iso8601">
-     <term><constant>DateTimeInterface::ISO8601</constant></term>
+     <term>
+      <constant>DateTimeInterface::ISO8601</constant>
+      <type>string</type>
+     </term>
      <term><constant>DATE_ISO8601</constant></term>
      <listitem>
       <simpara>
@@ -191,7 +200,10 @@
     </varlistentry>
 
     <varlistentry xml:id="datetimeinterface.constants.iso8601-expanded">
-     <term><constant>DateTimeInterface::ISO8601_EXPANDED</constant></term>
+     <term>
+      <constant>DateTimeInterface::ISO8601_EXPANDED</constant>
+      <type>string</type>
+     </term>
      <term><constant>DATE_ISO8601_EXPANDED</constant></term>
      <listitem>
       <simpara>
@@ -209,7 +221,10 @@
     </varlistentry>
 
     <varlistentry xml:id="datetimeinterface.constants.rfc822">
-     <term><constant>DateTimeInterface::RFC822</constant></term>
+     <term>
+      <constant>DateTimeInterface::RFC822</constant>
+      <type>string</type>
+     </term>
      <term><constant>DATE_RFC822</constant></term>
      <listitem>
       <simpara>
@@ -219,7 +234,10 @@
     </varlistentry>
 
     <varlistentry xml:id="datetimeinterface.constants.rfc850">
-     <term><constant>DateTimeInterface::RFC850</constant></term>
+     <term>
+      <constant>DateTimeInterface::RFC850</constant>
+      <type>string</type>
+     </term>
      <term><constant>DATE_RFC850</constant></term>
      <listitem>
       <simpara>
@@ -229,7 +247,10 @@
     </varlistentry>
 
     <varlistentry xml:id="datetimeinterface.constants.rfc1036">
-     <term><constant>DateTimeInterface::RFC1036</constant></term>
+     <term>
+      <constant>DateTimeInterface::RFC1036</constant>
+      <type>string</type>
+     </term>
      <term><constant>DATE_RFC1036</constant></term>
      <listitem>
       <simpara>
@@ -239,7 +260,10 @@
     </varlistentry>
 
     <varlistentry xml:id="datetimeinterface.constants.rfc1123">
-     <term><constant>DateTimeInterface::RFC1123</constant></term>
+     <term>
+      <constant>DateTimeInterface::RFC1123</constant>
+      <type>string</type>
+     </term>
      <term><constant>DATE_RFC1123</constant></term>
      <listitem>
       <simpara>
@@ -249,7 +273,10 @@
     </varlistentry>
 
     <varlistentry xml:id="datetimeinterface.constants.rfc7231">
-      <term><constant>DateTimeInterface::RFC7231</constant></term>
+      <term>
+       <constant>DateTimeInterface::RFC7231</constant>
+       <type>string</type>
+      </term>
       <term><constant>DATE_RFC7231</constant></term>
       <listitem>
        <simpara>
@@ -259,7 +286,10 @@
     </varlistentry>
 
     <varlistentry xml:id="datetimeinterface.constants.rfc2822">
-     <term><constant>DateTimeInterface::RFC2822</constant></term>
+     <term>
+      <constant>DateTimeInterface::RFC2822</constant>
+      <type>string</type>
+     </term>
      <term><constant>DATE_RFC2822</constant></term>
      <listitem>
       <simpara>
@@ -269,7 +299,10 @@
     </varlistentry>
 
     <varlistentry xml:id="datetimeinterface.constants.rfc3339">
-     <term><constant>DateTimeInterface::RFC3339</constant></term>
+     <term>
+      <constant>DateTimeInterface::RFC3339</constant>
+      <type>string</type>
+     </term>
      <term><constant>DATE_RFC3339</constant></term>
      <listitem>
       <simpara>
@@ -279,7 +312,10 @@
     </varlistentry>
 
     <varlistentry xml:id="datetimeinterface.constants.rfc3339-extended">
-     <term><constant>DateTimeInterface::RFC3339_EXTENDED</constant></term>
+     <term>
+      <constant>DateTimeInterface::RFC3339_EXTENDED</constant>
+      <type>string</type>
+     </term>
      <term><constant>DATE_RFC3339_EXTENDED</constant></term>
      <listitem>
       <simpara>
@@ -289,7 +325,10 @@
     </varlistentry>
 
     <varlistentry xml:id="datetimeinterface.constants.rss">
-     <term><constant>DateTimeInterface::RSS</constant></term>
+     <term>
+      <constant>DateTimeInterface::RSS</constant>
+      <type>string</type>
+     </term>
      <term><constant>DATE_RSS</constant></term>
      <listitem>
       <simpara>
@@ -299,7 +338,10 @@
     </varlistentry>
 
     <varlistentry xml:id="datetimeinterface.constants.w3c">
-     <term><constant>DateTimeInterface::W3C</constant></term>
+     <term>
+      <constant>DateTimeInterface::W3C</constant>
+      <type>string</type>
+     </term>
      <term><constant>DATE_W3C</constant></term>
      <listitem>
       <simpara>
@@ -324,6 +366,10 @@
       </row>
      </thead>
      <tbody>
+      <row>
+       <entry>8.4.0</entry>
+       <entry>クラス定数が型付けされました。</entry>
+      </row>
       <row>
        <entry>8.2.0</entry>
        <entry>
diff --git a/reference/datetime/datetimezone.xml b/reference/datetime/datetimezone.xml
index a05c2a83b9..0c21d34a58 100644
--- a/reference/datetime/datetimezone.xml
+++ b/reference/datetime/datetimezone.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
-<!-- EN-Revision: 14767af0f05dffa6fdb9b49e1a1f4e9ca7022a60 Maintainer: takagi Status: ready -->
+<!-- EN-Revision: 576c7c43febb2eec5718d8320f92606423413983 Maintainer: takagi Status: ready -->
 <reference xml:id="class.datetimezone" role="class" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
 
  <title>DateTimeZone クラス</title>
@@ -129,98 +129,140 @@
    &reftitle.constants;
    <variablelist>
     <varlistentry xml:id="datetimezone.constants.africa">
-     <term><constant>DateTimeZone::AFRICA</constant></term>
+     <term>
+      <constant>DateTimeZone::AFRICA</constant>
+      <type>int</type>
+     </term>
      <listitem>
       <para>アフリカのタイムゾーン。</para>
      </listitem>
     </varlistentry>
 
     <varlistentry xml:id="datetimezone.constants.america">
-     <term><constant>DateTimeZone::AMERICA</constant></term>
+     <term>
+      <constant>DateTimeZone::AMERICA</constant>
+      <type>int</type>
+     </term>
      <listitem>
       <para>アメリカのタイムゾーン。</para>
      </listitem>
     </varlistentry>
 
     <varlistentry xml:id="datetimezone.constants.antarctica">
-     <term><constant>DateTimeZone::ANTARCTICA</constant></term>
+     <term>
+      <constant>DateTimeZone::ANTARCTICA</constant>
+      <type>int</type>
+     </term>
      <listitem>
       <para>南極のタイムゾーン。</para>
      </listitem>
     </varlistentry>
 
     <varlistentry xml:id="datetimezone.constants.arctic">
-     <term><constant>DateTimeZone::ARCTIC</constant></term>
+     <term>
+      <constant>DateTimeZone::ARCTIC</constant>
+      <type>int</type>
+     </term>
      <listitem>
       <para>北極のタイムゾーン。</para>
      </listitem>
     </varlistentry>
 
     <varlistentry xml:id="datetimezone.constants.asia">
-     <term><constant>DateTimeZone::ASIA</constant></term>
+     <term>
+      <constant>DateTimeZone::ASIA</constant>
+      <type>int</type>
+     </term>
      <listitem>
       <para>アジアのタイムゾーン。</para>
      </listitem>
     </varlistentry>
 
     <varlistentry xml:id="datetimezone.constants.atlantic">
-     <term><constant>DateTimeZone::ATLANTIC</constant></term>
+     <term>
+      <constant>DateTimeZone::ATLANTIC</constant>
+      <type>int</type>
+     </term>
      <listitem>
       <para>大西洋のタイムゾーン。</para>
      </listitem>
     </varlistentry>
 
     <varlistentry xml:id="datetimezone.constants.australia">
-     <term><constant>DateTimeZone::AUSTRALIA</constant></term>
+     <term>
+      <constant>DateTimeZone::AUSTRALIA</constant>
+      <type>int</type>
+     </term>
      <listitem>
       <para>オーストラリアのタイムゾーン。</para>
      </listitem>
     </varlistentry>
 
     <varlistentry xml:id="datetimezone.constants.europe">
-     <term><constant>DateTimeZone::EUROPE</constant></term>
+     <term>
+      <constant>DateTimeZone::EUROPE</constant>
+      <type>int</type>
+     </term>
      <listitem>
       <para>ヨーロッパのタイムゾーン。</para>
      </listitem>
     </varlistentry>
 
     <varlistentry xml:id="datetimezone.constants.indian">
-     <term><constant>DateTimeZone::INDIAN</constant></term>
+     <term>
+      <constant>DateTimeZone::INDIAN</constant>
+      <type>int</type>
+     </term>
      <listitem>
       <para>インドのタイムゾーン。</para>
      </listitem>
     </varlistentry>
 
     <varlistentry xml:id="datetimezone.constants.pacific">
-     <term><constant>DateTimeZone::PACIFIC</constant></term>
+     <term>
+      <constant>DateTimeZone::PACIFIC</constant>
+      <type>int</type>
+     </term>
      <listitem>
       <para>太平洋のタイムゾーン。</para>
      </listitem>
     </varlistentry>
 
     <varlistentry xml:id="datetimezone.constants.utc">
-     <term><constant>DateTimeZone::UTC</constant></term>
+     <term>
+      <constant>DateTimeZone::UTC</constant>
+      <type>int</type>
+     </term>
      <listitem>
       <para>UTC タイムゾーン。</para>
      </listitem>
     </varlistentry>
 
     <varlistentry xml:id="datetimezone.constants.all">
-     <term><constant>DateTimeZone::ALL</constant></term>
+     <term>
+      <constant>DateTimeZone::ALL</constant>
+      <type>int</type>
+     </term>
      <listitem>
       <para>すべてのタイムゾーン。</para>
      </listitem>
     </varlistentry>
 
     <varlistentry xml:id="datetimezone.constants.all-with-bc">
-     <term><constant>DateTimeZone::ALL_WITH_BC</constant></term>
+     <term>
+      <constant>DateTimeZone::ALL_WITH_BC</constant>
+      <type>int</type>
+     </term>
      <listitem>
       <para>過去との互換性を保つものを含むすべてのタイムゾーン。</para>
      </listitem>
     </varlistentry>
 
     <varlistentry xml:id="datetimezone.constants.per-country">
-     <term><constant>DateTimeZone::PER_COUNTRY</constant></term>
+     <term>
+      <constant>DateTimeZone::PER_COUNTRY</constant>
+      <type>int</type>
+     </term>
      <listitem>
       <para>国ごとのタイムゾーン。</para>
      </listitem>
@@ -229,7 +271,27 @@
    </variablelist>
   </section>
 <!-- }}} -->
-
+  <section role="changelog" xml:id="datetimezone.changelog">
+   &reftitle.changelog;
+   <informaltable>
+    <tgroup cols="2">
+     <thead>
+      <row>
+       <entry>&Version;</entry>
+       <entry>&Description;</entry>
+      </row>
+     </thead>
+     <tbody>
+      <row>
+       <entry>8.4.0</entry>
+       <entry>
+        クラス定数が型付けされました。
+       </entry>
+      </row>
+     </tbody>
+    </tgroup>
+   </informaltable>
+  </section>
 
  </partintro>