diff --git a/README.md b/README.md
index ad6398c..4bcca34 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Proposal for Intl.DurationFormat
 
-**Stage**: 3
+**Stage**: 4
 
 **Champion**: [Younies Mahmoud](https://github.com/younies), [Ujjwal Sharma](https://github.com/ryzokuken)
 
@@ -23,6 +23,7 @@
 - This proposal reached Stage 1 at the 2020 Feb TC39 meeting.
 - This proposal reached Stage 2 at the 2020 June TC39 meeting.
 - This proposal reached Stage 3 at the 2021 October TC39 meeting.
+- This proposal reached Stage 4 at the 2024 December TC39 meeting.
 
 ## Overview
 
diff --git a/index.html b/index.html
index dc84ff8..4bfe115 100644
--- a/index.html
+++ b/index.html
@@ -3261,12 +3261,12 @@
     @media print {
       @page :left {
         @bottom-right {
-          content: '© Ecma International 2024';
+          content: '© Ecma International 2025';
         }
       }
       @page :right {
         @bottom-left {
-          content: '© Ecma International 2024';
+          content: '© Ecma International 2025';
         }
       }
       @page :first {
@@ -3297,7 +3297,7 @@
 </ul></div><div id="menu-toggle"><svg xmlns="http://www.w3.org/2000/svg" style="width:100%; height:100%; stroke:currentColor" viewBox="0 0 120 120" width="54" height="54">
       <title>Menu</title>
       <path stroke-width="10" stroke-linecap="round" d="M30,60 h60  M30,30 m0,5 h60  M30,90 m0,-5 h60"></path>
-    </svg></div><div id="menu-spacer" class="menu-spacer"></div><div id="menu"><div id="menu-search"><input type="text" id="menu-search-box" placeholder="Search..."><div id="menu-search-results" class="inactive"></div></div><div id="menu-pins"><div class="menu-pane-header">Pins<button class="unpin-all">clear</button></div><ul id="menu-pins-list"></ul></div><div class="menu-pane-header">Table of Contents</div><div id="menu-toc"><ol class="toc"><li><span class="item-toggle">+</span><a href="#durationformat-objects" title="DurationFormat Objects"><span class="secnum">1</span> DurationFormat Objects</a><ol class="toc"><li><span class="item-toggle">+</span><a href="#sec-intl-durationformat-abstracts" title="Abstract Operations for DurationFormat Objects"><span class="secnum">1.1</span> Abstract Operations for DurationFormat Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-duration-records" title="Duration Records"><span class="secnum">1.1.1</span> Duration Records</a></li><li><span class="item-toggle-none"></span><a href="#sec-tointegerifintegral" title="ToIntegerIfIntegral ( argument )"><span class="secnum">1.1.2</span> ToIntegerIfIntegral ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-todurationrecord" title="ToDurationRecord ( input )"><span class="secnum">1.1.3</span> ToDurationRecord ( <var>input</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-durationsign" title="DurationSign ( duration )"><span class="secnum">1.1.4</span> DurationSign ( <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isvalidduration" title="IsValidDuration ( years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds )"><span class="secnum">1.1.5</span> IsValidDuration ( <var>years</var>, <var>months</var>, <var>weeks</var>, <var>days</var>, <var>hours</var>, <var>minutes</var>, <var>seconds</var>, <var>milliseconds</var>, <var>microseconds</var>, <var>nanoseconds</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getdurationunitoptions" title="GetDurationUnitOptions ( unit, options, baseStyle, stylesList, digitalBase, prevStyle, twoDigitHours )"><span class="secnum">1.1.6</span> GetDurationUnitOptions ( <var>unit</var>, <var>options</var>, <var>baseStyle</var>, <var>stylesList</var>, <var>digitalBase</var>, <var>prevStyle</var>, <var>twoDigitHours</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-computefractionaldigits" title="ComputeFractionalDigits ( durationFormat, duration )"><span class="secnum">1.1.7</span> ComputeFractionalDigits ( <var>durationFormat</var>, <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-nextunitfractional" title="NextUnitFractional ( durationFormat, unit )"><span class="secnum">1.1.8</span> NextUnitFractional ( <var>durationFormat</var>, <var>unit</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumerichours" title="FormatNumericHours ( durationFormat, hoursValue, signDisplayed )"><span class="secnum">1.1.9</span> FormatNumericHours ( <var>durationFormat</var>, <var>hoursValue</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumericminutes" title="FormatNumericMinutes ( durationFormat, minutesValue, hoursDisplayed, signDisplayed )"><span class="secnum">1.1.10</span> FormatNumericMinutes ( <var>durationFormat</var>, <var>minutesValue</var>, <var>hoursDisplayed</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumericseconds" title="FormatNumericSeconds ( durationFormat, secondsValue, minutesDisplayed, signDisplayed )"><span class="secnum">1.1.11</span> FormatNumericSeconds ( <var>durationFormat</var>, <var>secondsValue</var>, <var>minutesDisplayed</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumericunits" title="FormatNumericUnits ( durationFormat, duration, firstNumericUnit, signDisplayed )"><span class="secnum">1.1.12</span> FormatNumericUnits ( <var>durationFormat</var>, <var>duration</var>, <var>firstNumericUnit</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-listformatparts" title="ListFormatParts ( durationFormat, partitionedPartsList )"><span class="secnum">1.1.13</span> ListFormatParts ( <var>durationFormat</var>, <var>partitionedPartsList</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-partitiondurationformatpattern" title="PartitionDurationFormatPattern ( durationFormat, duration )"><span class="secnum">1.1.14</span> PartitionDurationFormatPattern ( <var>durationFormat</var>, <var>duration</var> )</a></li></ol></li><li><span class="item-toggle">+</span><a href="#sec-intl-durationformat-constructor" title="The Intl.DurationFormat Constructor"><span class="secnum">1.2</span> The Intl.DurationFormat Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat" title="Intl.DurationFormat ( [ locales [ , options ] ] )"><span class="secnum">1.2.1</span> Intl.DurationFormat ( [ <var>locales</var> [ , <var>options</var> ] ] )</a></li></ol></li><li><span class="item-toggle">+</span><a href="#sec-properties-of-intl-durationformat-constructor" title="Properties of the Intl.DurationFormat Constructor"><span class="secnum">1.3</span> Properties of the Intl.DurationFormat Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype" title="Intl.DurationFormat.prototype"><span class="secnum">1.3.1</span> Intl.DurationFormat.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.supportedLocalesOf" title="Intl.DurationFormat.supportedLocalesOf ( locales [ , options ] )"><span class="secnum">1.3.2</span> Intl.DurationFormat.supportedLocalesOf ( <var>locales</var> [ , <var>options</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat-internal-slots" title="Internal slots"><span class="secnum">1.3.3</span> Internal slots</a></li></ol></li><li><span class="item-toggle">+</span><a href="#sec-properties-of-intl-durationformat-prototype-object" title="Properties of the Intl.DurationFormat Prototype Object"><span class="secnum">1.4</span> Properties of the Intl.DurationFormat Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.constructor" title="Intl.DurationFormat.prototype.constructor"><span class="secnum">1.4.1</span> Intl.DurationFormat.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype-@@tostringtag" title="Intl.DurationFormat.prototype [ @@toStringTag ]"><span class="secnum">1.4.2</span> Intl.DurationFormat.prototype [ @@toStringTag ]</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.format" title="Intl.DurationFormat.prototype.format ( duration )"><span class="secnum">1.4.3</span> Intl.DurationFormat.prototype.format ( <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.formatToParts" title="Intl.DurationFormat.prototype.formatToParts ( duration )"><span class="secnum">1.4.4</span> Intl.DurationFormat.prototype.formatToParts ( <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.resolvedOptions" title="Intl.DurationFormat.prototype.resolvedOptions ( )"><span class="secnum">1.4.5</span> Intl.DurationFormat.prototype.resolvedOptions ( )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-intl-durationformat-instances" title="Properties of Intl.DurationFormat Instances"><span class="secnum">1.5</span> Properties of Intl.DurationFormat Instances</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-copyright-and-software-license" title="Copyright &amp; Software License"><span class="secnum">A</span> Copyright &amp; Software License</a></li></ol></div></div><div id="spec-container"><h1 class="version">Stage 3 Draft / November 13, 2024</h1><h1 class="title">Intl.DurationFormat</h1>
+    </svg></div><div id="menu-spacer" class="menu-spacer"></div><div id="menu"><div id="menu-search"><input type="text" id="menu-search-box" placeholder="Search..."><div id="menu-search-results" class="inactive"></div></div><div id="menu-pins"><div class="menu-pane-header">Pins<button class="unpin-all">clear</button></div><ul id="menu-pins-list"></ul></div><div class="menu-pane-header">Table of Contents</div><div id="menu-toc"><ol class="toc"><li><span class="item-toggle">+</span><a href="#durationformat-objects" title="DurationFormat Objects"><span class="secnum">1</span> DurationFormat Objects</a><ol class="toc"><li><span class="item-toggle">+</span><a href="#sec-intl-durationformat-abstracts" title="Abstract Operations for DurationFormat Objects"><span class="secnum">1.1</span> Abstract Operations for DurationFormat Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-duration-records" title="Duration Records"><span class="secnum">1.1.1</span> Duration Records</a></li><li><span class="item-toggle-none"></span><a href="#sec-tointegerifintegral" title="ToIntegerIfIntegral ( argument )"><span class="secnum">1.1.2</span> ToIntegerIfIntegral ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-todurationrecord" title="ToDurationRecord ( input )"><span class="secnum">1.1.3</span> ToDurationRecord ( <var>input</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-durationsign" title="DurationSign ( duration )"><span class="secnum">1.1.4</span> DurationSign ( <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isvalidduration" title="IsValidDuration ( years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds )"><span class="secnum">1.1.5</span> IsValidDuration ( <var>years</var>, <var>months</var>, <var>weeks</var>, <var>days</var>, <var>hours</var>, <var>minutes</var>, <var>seconds</var>, <var>milliseconds</var>, <var>microseconds</var>, <var>nanoseconds</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getdurationunitoptions" title="GetDurationUnitOptions ( unit, options, baseStyle, stylesList, digitalBase, prevStyle, twoDigitHours )"><span class="secnum">1.1.6</span> GetDurationUnitOptions ( <var>unit</var>, <var>options</var>, <var>baseStyle</var>, <var>stylesList</var>, <var>digitalBase</var>, <var>prevStyle</var>, <var>twoDigitHours</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-computefractionaldigits" title="ComputeFractionalDigits ( durationFormat, duration )"><span class="secnum">1.1.7</span> ComputeFractionalDigits ( <var>durationFormat</var>, <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-nextunitfractional" title="NextUnitFractional ( durationFormat, unit )"><span class="secnum">1.1.8</span> NextUnitFractional ( <var>durationFormat</var>, <var>unit</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumerichours" title="FormatNumericHours ( durationFormat, hoursValue, signDisplayed )"><span class="secnum">1.1.9</span> FormatNumericHours ( <var>durationFormat</var>, <var>hoursValue</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumericminutes" title="FormatNumericMinutes ( durationFormat, minutesValue, hoursDisplayed, signDisplayed )"><span class="secnum">1.1.10</span> FormatNumericMinutes ( <var>durationFormat</var>, <var>minutesValue</var>, <var>hoursDisplayed</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumericseconds" title="FormatNumericSeconds ( durationFormat, secondsValue, minutesDisplayed, signDisplayed )"><span class="secnum">1.1.11</span> FormatNumericSeconds ( <var>durationFormat</var>, <var>secondsValue</var>, <var>minutesDisplayed</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumericunits" title="FormatNumericUnits ( durationFormat, duration, firstNumericUnit, signDisplayed )"><span class="secnum">1.1.12</span> FormatNumericUnits ( <var>durationFormat</var>, <var>duration</var>, <var>firstNumericUnit</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-listformatparts" title="ListFormatParts ( durationFormat, partitionedPartsList )"><span class="secnum">1.1.13</span> ListFormatParts ( <var>durationFormat</var>, <var>partitionedPartsList</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-partitiondurationformatpattern" title="PartitionDurationFormatPattern ( durationFormat, duration )"><span class="secnum">1.1.14</span> PartitionDurationFormatPattern ( <var>durationFormat</var>, <var>duration</var> )</a></li></ol></li><li><span class="item-toggle">+</span><a href="#sec-intl-durationformat-constructor" title="The Intl.DurationFormat Constructor"><span class="secnum">1.2</span> The Intl.DurationFormat Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat" title="Intl.DurationFormat ( [ locales [ , options ] ] )"><span class="secnum">1.2.1</span> Intl.DurationFormat ( [ <var>locales</var> [ , <var>options</var> ] ] )</a></li></ol></li><li><span class="item-toggle">+</span><a href="#sec-properties-of-intl-durationformat-constructor" title="Properties of the Intl.DurationFormat Constructor"><span class="secnum">1.3</span> Properties of the Intl.DurationFormat Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype" title="Intl.DurationFormat.prototype"><span class="secnum">1.3.1</span> Intl.DurationFormat.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.supportedLocalesOf" title="Intl.DurationFormat.supportedLocalesOf ( locales [ , options ] )"><span class="secnum">1.3.2</span> Intl.DurationFormat.supportedLocalesOf ( <var>locales</var> [ , <var>options</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat-internal-slots" title="Internal slots"><span class="secnum">1.3.3</span> Internal slots</a></li></ol></li><li><span class="item-toggle">+</span><a href="#sec-properties-of-intl-durationformat-prototype-object" title="Properties of the Intl.DurationFormat Prototype Object"><span class="secnum">1.4</span> Properties of the Intl.DurationFormat Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.constructor" title="Intl.DurationFormat.prototype.constructor"><span class="secnum">1.4.1</span> Intl.DurationFormat.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype-@@tostringtag" title="Intl.DurationFormat.prototype [ @@toStringTag ]"><span class="secnum">1.4.2</span> Intl.DurationFormat.prototype [ @@toStringTag ]</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.format" title="Intl.DurationFormat.prototype.format ( duration )"><span class="secnum">1.4.3</span> Intl.DurationFormat.prototype.format ( <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.formatToParts" title="Intl.DurationFormat.prototype.formatToParts ( duration )"><span class="secnum">1.4.4</span> Intl.DurationFormat.prototype.formatToParts ( <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.resolvedOptions" title="Intl.DurationFormat.prototype.resolvedOptions ( )"><span class="secnum">1.4.5</span> Intl.DurationFormat.prototype.resolvedOptions ( )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-intl-durationformat-instances" title="Properties of Intl.DurationFormat Instances"><span class="secnum">1.5</span> Properties of Intl.DurationFormat Instances</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-copyright-and-software-license" title="Copyright &amp; Software License"><span class="secnum">A</span> Copyright &amp; Software License</a></li></ol></div></div><div id="spec-container"><h1 class="version">Stage 3 Draft / January 6, 2025</h1><h1 class="title">Intl.DurationFormat</h1>
 <emu-clause id="durationformat-objects">
   <h1><span class="secnum">1</span> DurationFormat Objects</h1>
 
@@ -3887,7 +3887,7 @@ <h1><span class="secnum">1.5</span> Properties of Intl.DurationFormat Instances<
       <h1><span class="secnum">A</span> Copyright &amp; Software License</h1>
       
       <h2>Copyright Notice</h2>
-      <p>© 2024 Ujjwal Sharma, Younies Mahmoud</p>
+      <p>© 2025 Ujjwal Sharma, Younies Mahmoud</p>
 
       <h2>Software License</h2>
       <p>All Software contained in this document ("Software") is protected by copyright and is being made available under the "BSD License", included below. This Software may be subject to third party rights (rights from parties other than Ecma International), including patent rights, and no licenses under such third party rights are granted under this license even if the third party concerned is a member of Ecma International. SEE THE ECMA CODE OF CONDUCT IN PATENT MATTERS AVAILABLE AT <a href="https://ecma-international.org/memento/codeofconduct.htm">https://ecma-international.org/memento/codeofconduct.htm</a> FOR INFORMATION REGARDING THE LICENSING OF PATENT CLAIMS THAT ARE REQUIRED TO IMPLEMENT ECMA INTERNATIONAL STANDARDS.</p>