diff --git a/README.md b/README.md
index e5e2fda..e5734bf 100644
--- a/README.md
+++ b/README.md
@@ -223,6 +223,23 @@ Attribution data for every file is written to `sunrise-sounds/manifest.json`.
 ./4-seasons.sh east
 ```
 
+**Re-run a daily seasons clip** for a specific past date:
+```bash
+./4-seasons.sh east 2026-04-19
+```
+
+**Backfill multiple past dates** (useful after a camera outage or a fresh install with existing images):
+```bash
+for d in 2026-04-15 2026-04-16 2026-04-17 2026-04-18 2026-04-19; do
+    ./4-seasons.sh east "$d"
+done
+```
+
+Replace the date list with whatever range you need.  Each run produces one `*-final.mp4` in the movement's output directory.  Once all days for a movement are present you can build the montage manually:
+```bash
+./montage-mvt.sh east 2026-04-19   # date of the last day of that movement
+```
+
 **Rebuild a movement montage** (e.g. to retry audio after a failure):
 ```bash
 ./montage-mvt.sh east                   # uses today's date