@@ -0,0 +1,18 @@
+---
+'@object-ui/fields': patch
+'@object-ui/plugin-grid': patch
+---
+
+fix(fields,plugin-grid): a grid's `date` column reads in one absolute face when its field declares no `format`
+
+Clause-②: no
+Metadata-protocol: none
+
+A list grid's `date` column used to mix three faces in one column, for example "Yesterday · 3 days ago · Sep 25 · Sep 20, 2025". The cell's default face was `'relative'`, which writes a relative phrase within ±7 days of today and an absolute date outside that window. A sorted column did not look sorted, and "Yesterday" in an expiry column read as a status.
+
+- **Default change for an undeclared `format` (visible from metadata).** In a grid column, a `date` field that declares no `format` now renders the locale's short absolute date: `Oct 25`, with the year added when the date is not in the current year. Every row of the column uses this one face. The group headings of a grid grouped by that field change with it, so a heading still reads like the cell under it.
+- **The relative phrase moves to the tooltip.** It is shown on hover ("Yesterday", "In 2 days", or "Overdue 3d" on a declared `dueLike` field). A date outside the ±7-day window has no relative phrase, so it keeps its ISO `title` as before. A past declared deadline is still red.
+- **A declared `format` still wins.** A field that declares `format: 'relative'` keeps the relative face in the grid. This is how an author who wants relative wording in a list keeps it.
+- **Other surfaces are unchanged.** The record detail body, the header highlights strip, kanban and gallery cards, the tree, a record page's related list and the grid's record panel render `date` cells as before. `DateCellRenderer` paints the absolute default only when its host passes the new `inGridColumn` prop, and `ObjectGrid` passes it on every column it builds. On mobile, a grid card draws its title through the column's cell, so a `date` title reads absolute there too; the card's other date slots were already absolute. `datetime` cells are not affected, because their default face was already absolute (`compact`).
+
+What to do: nothing. To keep the relative wording in a grid column, declare `format: 'relative'` on the field.
@@ -425,6 +425,23 @@ export interface CellRendererProps {
    * the default face that drops the current year.
    */
   alwaysShowYear?: boolean;
+  /**
+   * The cell is one of a grid COLUMN's cells, read against the cells above
+   * and below it (objectstack#25884). Read by the `date` cell only.
+   *
+   * A `date` field that declares no `format` then paints `formatDate`'s
+   * absolute default face instead of `'relative'`, and the relative phrase
+   * becomes the cell's tooltip. The relative face is absolute outside a ±7-day
+   * window, so as a column default it mixed faces in one column ("Yesterday",
+   * "Sep 25", "Sep 20, 2025"), and a sorted column did not look sorted. The
+   * ruling on the card: absolute in a sortable column, relative at most as a
+   * tooltip. A declared `format` still wins, `'relative'` included.
+   *
+   * `ObjectGrid` passes it on every column cell it builds. Absent or `false`
+   * changes nothing, so the record detail body, the highlights strip and the
+   * card surfaces keep the relative default.
+   */
+  inGridColumn?: boolean;
 }
 
 // `coerceToSafeValue` lives in `./coerceToSafeValue.ts` (objectui#8580) so
@@ -1144,7 +1161,7 @@ function isOverdueInstant(date: Date, dueLike: boolean): boolean {
 /**
  * Date field cell renderer
  */
-export function DateCellRenderer({ value, field, deadlineSettled, alwaysShowYear }: CellRendererProps): React.ReactElement {
+export function DateCellRenderer({ value, field, deadlineSettled, alwaysShowYear, inGridColumn }: CellRendererProps): React.ReactElement {
   // `useDisplayLocale()`, NOT `useLocalization().locale` (objectui#4468). The
   // raw tenant locale is `undefined` on any workspace that never configured
   // one, and `Intl` reads the MACHINE's locale from `undefined` — so a `zh`
@@ -1205,19 +1222,34 @@ export function DateCellRenderer({ value, field, deadlineSettled, alwaysShowYear
   const date = new Date(safe as string | number);
 
   const dateField = field as any;
-  const style = dateField.format || 'relative';
+  const declaredStyle: string | undefined = dateField.format || undefined;
+  // objectstack#25884 — in a grid column the undeclared default is the
+  // absolute face (`formatDate`'s default, `undefined`), one face per column;
+  // everywhere else it stays `'relative'`. ⚠️ `ObjectGrid`'s
+  // `temporalGroupHeading` restates this selection for its group headings,
+  // and `groupDateHeading-13234.test.tsx` holds the two equal.
+  const style = declaredStyle ?? (inGridColumn ? undefined : 'relative');
 
   // Both halves of the affordance come from the shared reads above, so the
   // `datetime` sibling one function down answers this question identically
   // instead of carrying a second copy (objectui#8958).
   const dueLike = resolveDueLike(field, deadlineSettled);
-  const formatted = formatDate(safe as string | Date, style, { dueLike, locale, t, alwaysShowYear });
+  const options = { dueLike, locale, t, alwaysShowYear };
+  const formatted = formatDate(safe as string | Date, style, options);
   const isOverdue = isOverdueInstant(displayDate, dueLike);
 
+  // The relative phrase the grid default no longer paints ("Yesterday",
+  // "Overdue 3d") is the tooltip instead. Outside the ±7-day window the phrase
+  // IS the absolute face, which says nothing new, so the ISO `title` stays.
+  const relative = inGridColumn && declaredStyle === undefined
+    ? formatDate(safe as string | Date, 'relative', options)
+    : undefined;
+  const title = relative !== undefined && relative !== formatted ? relative : date.toISOString();
+
   return (
     <span
       className={`tabular-nums${isOverdue ? ' text-red-600' : ''}`}
-      title={date.toISOString()}
+      title={title}
     >
       {formatted}
     </span>
 
@@ -636,7 +636,9 @@ interface TemporalGroupFace {
  * empty key, the stored text otherwise.
  *
  * The formatting CALLS are the cells' own, with the cells' arguments:
- * `DateCellRenderer` paints `formatDate(value, format || 'relative', …)`;
+ * `DateCellRenderer` in a grid column (`inGridColumn`, objectstack#25884)
+ * paints `formatDate(value, format || undefined, …)`, the absolute default
+ * face when no `format` is declared;
  * `DateTimeCellRenderer` paints `formatRelativeDate` for `'relative'`, the
  * compact face for no format and for `'short'`, and `formatDateTime` with the
  * authored word otherwise (the compact face's string is the cell's two halves
@@ -661,7 +663,7 @@ function temporalGroupHeading(
   if (!key) return undefined;
   // The cells' validity guard, the shared parse step.
   if (isNaN(toDisplayDate(key).getTime())) return undefined;
-  if (face.rendererType === 'date') return formatDate(key, face.format || 'relative', { locale });
+  if (face.rendererType === 'date') return formatDate(key, face.format || undefined, { locale });
   // A `datetime` cell renders an INSTANT, from the engine's parse.
   const instant = new Date(key);
   const style = !face.format || face.format === 'short' ? 'compact' : face.format;
@@ -2707,6 +2709,12 @@ export const ObjectGrid: React.FC<ObjectGridComponentProps> = ({
     // one helper in `@object-ui/core`, with the scope and relation collapse
     // this grid's conditional formatting uses; a field that is not a declared
     // deadline answers `false` before any predicate runs.
+    //
+    // objectstack#25884 — every column cell built below also carries
+    // `inGridColumn`, so a `date` field with no declared `format` reads in
+    // one absolute face down the column (`CellRendererProps.inGridColumn`).
+    // The record panel and the mobile card's slots draw their cells without
+    // it, outside this function.
     const settledFor = (field: unknown, row: Record<string, unknown> | undefined): boolean =>
       isDeadlineSettled(field as Parameters<typeof isDeadlineSettled>[0], row, { scope: predicateScope, fields: objectFields });
     // Map field type to column header icon (Airtable-style)
@@ -3030,7 +3038,7 @@ export const ObjectGrid: React.FC<ObjectGridComponentProps> = ({
               // Both link and action: link takes priority for navigation, action executes on secondary interaction
               cellRenderer = (value: any, row: any) => {
                 const displayContent = pointerFace?.(row) ?? (LinkContentRenderer
-                  ? <LinkContentRenderer value={value} field={fieldMeta as any} dependentValues={row} deadlineSettled={settledFor(fieldMeta, row)} />
+                  ? <LinkContentRenderer value={value} field={fieldMeta as any} dependentValues={row} deadlineSettled={settledFor(fieldMeta, row)} inGridColumn />
                   : (value != null && value !== '' ? String(value) : <EmptyValue />));
                 return (
                   <LinkCell
@@ -3048,7 +3056,7 @@ export const ObjectGrid: React.FC<ObjectGridComponentProps> = ({
               // Link column: clicking navigates to the record detail
               cellRenderer = (value: any, row: any) => {
                 const displayContent = pointerFace?.(row) ?? (LinkContentRenderer
-                  ? <LinkContentRenderer value={value} field={fieldMeta as any} dependentValues={row} deadlineSettled={settledFor(fieldMeta, row)} />
+                  ? <LinkContentRenderer value={value} field={fieldMeta as any} dependentValues={row} deadlineSettled={settledFor(fieldMeta, row)} inGridColumn />
                   : (value != null && value !== '' ? String(value) : <EmptyValue />));
                 return (
                   <LinkCell
@@ -3088,7 +3096,7 @@ export const ObjectGrid: React.FC<ObjectGridComponentProps> = ({
               // `dependentValues` for a cell whose value only means something
               // beside a sibling column (objectui#12613).
               cellRenderer = (value: any, row: any) => (
-                pointerFace?.(row) ?? <CellRenderer value={value} field={fieldMeta as any} dependentValues={row} deadlineSettled={settledFor(fieldMeta, row)} />
+                pointerFace?.(row) ?? <CellRenderer value={value} field={fieldMeta as any} dependentValues={row} deadlineSettled={settledFor(fieldMeta, row)} inGridColumn />
               );
             } else {
               // Default renderer with empty value handling
@@ -3269,7 +3277,7 @@ export const ObjectGrid: React.FC<ObjectGridComponentProps> = ({
 
           if (isPrimaryField && LinkContentRenderer) {
             cellRenderer = (value: any, row: any) => {
-              const displayContent = pointerFace?.(row) ?? <LinkContentRenderer value={value} field={fieldMeta as any} dependentValues={row} deadlineSettled={settledFor(fieldMeta, row)} />;
+              const displayContent = pointerFace?.(row) ?? <LinkContentRenderer value={value} field={fieldMeta as any} dependentValues={row} deadlineSettled={settledFor(fieldMeta, row)} inGridColumn />;
               return (
                 <LinkCell
                   testId="primary-field-link"
@@ -3293,7 +3301,7 @@ export const ObjectGrid: React.FC<ObjectGridComponentProps> = ({
               </LinkCell>
             );
           } else if (CellRenderer) {
-            cellRenderer = (value: any, row: any) => pointerFace?.(row) ?? <CellRenderer value={value} field={fieldMeta as any} dependentValues={row} deadlineSettled={settledFor(fieldMeta, row)} />;
+            cellRenderer = (value: any, row: any) => pointerFace?.(row) ?? <CellRenderer value={value} field={fieldMeta as any} dependentValues={row} deadlineSettled={settledFor(fieldMeta, row)} inGridColumn />;
           }
 
           return {
@@ -3458,7 +3466,7 @@ export const ObjectGrid: React.FC<ObjectGridComponentProps> = ({
             ...(schema.showColumnTypeIcons && rendererType && { headerIcon: getTypeIcon(rendererType) }),
             ...(inferredAlign && { align: inferredAlign }),
             ...(CellRenderer && {
-              cell: (value: any, row: any) => pointerFace?.(row) ?? <CellRenderer value={value} field={fieldMeta as any} dependentValues={row} deadlineSettled={settledFor(fieldMeta, row)} />,
+              cell: (value: any, row: any) => pointerFace?.(row) ?? <CellRenderer value={value} field={fieldMeta as any} dependentValues={row} deadlineSettled={settledFor(fieldMeta, row)} inGridColumn />,
             }),
             sortable: fieldDef?.sortable !== false,
           };
@@ -3566,7 +3574,7 @@ export const ObjectGrid: React.FC<ObjectGridComponentProps> = ({
         // Aligned on the RENDERER key, like paths A-C: a `text` column with
         // `format: 'currency'` renders as currency, so it aligns as currency.
         ...(!!rendererType && numericTypes.includes(rendererType) && { align: 'right' as const }),
-        cell: (value: any, row: any) => pointerFace?.(row) ?? <CellRenderer value={value} field={fieldForCell} dependentValues={row} deadlineSettled={settledFor(fieldForCell, row)} />,
+        cell: (value: any, row: any) => pointerFace?.(row) ?? <CellRenderer value={value} field={fieldForCell} dependentValues={row} deadlineSettled={settledFor(fieldForCell, row)} inGridColumn />,
         sortable: field.sortable !== false,
       });
     });