diff --git a/src/photo/PhotoDetailPage.tsx b/src/photo/PhotoDetailPage.tsx
index 7b806f25..0ff0677d 100644
--- a/src/photo/PhotoDetailPage.tsx
+++ b/src/photo/PhotoDetailPage.tsx
@@ -41,6 +41,7 @@ export default function PhotoDetailPage({
               tag={tag}
               photos={photos}
               selectedPhoto={photo}
+              dateRange={dateRange}
             />}
         />}
       {camera &&
diff --git a/src/photo/PhotoSetHeader.tsx b/src/photo/PhotoSetHeader.tsx
index 1f62dd39..f034a867 100644
--- a/src/photo/PhotoSetHeader.tsx
+++ b/src/photo/PhotoSetHeader.tsx
@@ -60,7 +60,7 @@ export default function PhotoSetHeader({
         )}>
           {start === end
             ? start
-            : <>{start}<br />– {end}</>}
+            : <>{end}<br />– {start}</>}
         </span>
       </div>]}
     />
diff --git a/src/photo/index.ts b/src/photo/index.ts
index 6bbb8508..d92b35c0 100644
--- a/src/photo/index.ts
+++ b/src/photo/index.ts
@@ -185,16 +185,26 @@ export const descriptionForPhotoSet = (
       photoLabelForCount(explicitCount ?? photos.length),
     ].join(' ');
 
+const sortPhotosByDate = (
+  photos: Photo[],
+  order: 'ASC' | 'DESC' = 'DESC'
+) =>
+  [...photos].sort((a, b) => order === 'DESC'
+    ? b.takenAt.getTime() - a.takenAt.getTime()
+    : a.takenAt.getTime() - b.takenAt.getTime());
+
 export const dateRangeForPhotos = (
   photos: Photo[],
   explicitDateRange?: PhotoDateRange,
 ) => {
+  const photosSorted = sortPhotosByDate(photos);
+
   const start = formatDateFromPostgresString(
-    explicitDateRange?.start ?? photos[0].takenAtNaive,
+    explicitDateRange?.start ?? photosSorted[photos.length - 1].takenAtNaive,
     true,
   );
   const end = formatDateFromPostgresString(
-    explicitDateRange?.end ?? photos[photos.length - 1].takenAtNaive,
+    explicitDateRange?.end ?? photosSorted[0].takenAtNaive,
     true
   );
   const description = start === end
diff --git a/src/services/postgres.ts b/src/services/postgres.ts
index 03cd5700..59a1bf06 100644
--- a/src/services/postgres.ts
+++ b/src/services/postgres.ts
@@ -202,7 +202,7 @@ const sqlGetPhotosByTag = (
     SELECT * FROM photos
     WHERE ${tag}=ANY(tags)
     AND hidden IS NOT TRUE
-    ORDER BY taken_at ASC
+    ORDER BY taken_at DESC
     LIMIT ${limit}
   `;
 
@@ -226,7 +226,7 @@ const sqlGetPhotosBySimulation = async (
   SELECT * FROM photos
   WHERE film_simulation=${simulation}
   AND hidden IS NOT TRUE
-  ORDER BY taken_at ASC
+  ORDER BY taken_at DESC
   LIMIT ${limit}
 `;
 
diff --git a/src/tag/TagHeader.tsx b/src/tag/TagHeader.tsx
index 36ffc44c..7d63ed21 100644
--- a/src/tag/TagHeader.tsx
+++ b/src/tag/TagHeader.tsx
@@ -1,4 +1,4 @@
-import { Photo } from '@/photo';
+import { Photo, PhotoDateRange } from '@/photo';
 import PhotoTag from './PhotoTag';
 import { descriptionForTaggedPhotos } from '.';
 import { pathForTagShare } from '@/site/paths';
@@ -9,11 +9,13 @@ export default function TagHeader({
   photos,
   selectedPhoto,
   count,
+  dateRange,
 }: {
   tag: string
   photos: Photo[]
   selectedPhoto?: Photo
   count?: number
+  dateRange?: PhotoDateRange
 }) {
   return (
     <PhotoSetHeader
@@ -24,6 +26,7 @@ export default function TagHeader({
       selectedPhoto={selectedPhoto}
       sharePath={pathForTagShare(tag)}
       count={count}
+      dateRange={dateRange}
     />
   );
 }