Make CalendarDateWeekOfYear return undefined

...for all calendars without well-defined week calendar system
tc39 · Jan 18, 2024 · c7a384c · c7a384c
1 parent 1a18bc0
commit c7a384c
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Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/spec/intl.html b/spec/intl.html
@@ -1697,6 +1697,9 @@ <h1>
             Usually the [[Year]] field will contain the same value given by CalendarDateYear, but may contain the previous or next year if the week number in the [[Week]] field overlaps two different years.
             See also ToISOWeekOfYear.
           </p>
+          <p>
+            It returns *undefined* in [[Week]] and [[Year]] field for calendars that do not have a well-defined week calendar system.
+          </p>
         </emu-clause>
 
         <emu-clause id="sec-temporal-calendardatedaysinweek" type="abstract operation">

diff --git a/spec/mainadditions.html b/spec/mainadditions.html
@@ -53,12 +53,12 @@ <h1>The Year-Week Record Specification Type</h1>
           <tbody>
             <tr>
               <td>[[Week]]</td>
-              <td>a positive integer</td>
+              <td>a positive integer or *undefined*</td>
               <td>The calendar week of year.</td>
             </tr>
             <tr>
               <td>[[Year]]</td>
-              <td>an integer</td>
+              <td>an integer or *undefined*</td>
               <td>The week calendar year.</td>
             </tr>
           </tbody>