diff --git a/CHANGELOG.md b/CHANGELOG.md
index 808bcf8..c799881 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,15 @@
+# devel
+
+## Added
+
+* `spansh.py` old station snearch now takes a `--minage` (in days) argument for 
+  what you would consider “outdated” data.
+
+## Changed
+
+* `spansh.py` old station search now outputs an age in days for the last update 
+  instead of a time stamp.
+
 # 0.5 (2020-07-01)
 
 Changed Changelog format. Should be even clearer now at a glance!
diff --git a/README.md b/README.md
index cf0e0b0..d75cf51 100644
--- a/README.md
+++ b/README.md
@@ -199,13 +199,15 @@ optional arguments:
 
 ```
 usage: spansh.py oldstations [-h] [--system [SYSTEM]] [--count [COUNT]]
-                             [--short]
+                             [--minage [MINAGE]] [--short]
 
 optional arguments:
   -h, --help         show this help message and exit
   --system [SYSTEM]  a single system to query. If not present, get the oldest
                      stations overall.
   --count [COUNT]    how many stations to output. Defaults to 50.
+  --minage [MINAGE]  minimum age of data (in days) to be considered
+                     “outdated”. Defaults to 365 (= 1 year).
   --short            short output format (system/station names only)
 ```
 
diff --git a/spansh.py b/spansh.py
index 6f01233..14f399d 100755
--- a/spansh.py
+++ b/spansh.py
@@ -141,6 +141,9 @@ parser_oldstations.add_argument("--system", nargs="?",
     + "overall.")
 parser_oldstations.add_argument("--count", nargs="?", type=int, default=50,
     help="how many stations to output. Defaults to 50.")
+parser_oldstations.add_argument("--minage", nargs="?", type=int, default=365,
+    help="minimum age of data (in days) to be considered “outdated”. Defaults to "
+    + "365 (= 1 year).")
 parser_oldstations.add_argument("--short", action='store_true',
     help="short output format (system/station names only)")
 
@@ -164,7 +167,7 @@ FILTERS = {
       {
         "value": [
           "2017-11-06",
-          (datetime.now() - timedelta(days=365)).strftime("%Y-%m-%d")
+          (datetime.now() - timedelta(days=args.minage)).strftime("%Y-%m-%d")
         ],
         "comparison": "<=>"
       }