Add persitent URLs for year/month/day in the diary

README.md

@@ -69,3 +69,13 @@ FolderName/
 | Day (`DD/`) | Entry content and photo grid |
 
 Days with photos but no `index.md` still appear in the month view and can be created by clicking their heading link.
+
+#### Persistent date links
+
+Each diary root exposes three stable paths intended for browser bookmarks. They redirect to the current dated URL on every visit:
+
+| Path | Redirects to |
+|------|-------------|
+| `<diary>/today/` | `<diary>/YYYY/MM/DD/` (or `…/?edit` if the day folder does not exist yet) |
+| `<diary>/this-month/` | `<diary>/YYYY/MM/` |
+| `<diary>/this-year/` | `<diary>/YYYY/` |