diff --git a/calendar/teachingdates/config/cli.py b/calendar/teachingdates/config/cli.py
index 5fc7b8d..c73c272 100644
--- a/calendar/teachingdates/config/cli.py
+++ b/calendar/teachingdates/config/cli.py
@@ -103,12 +103,21 @@
                         help="teaching period [required]")
 
     parser.add_argument(
+        "--week-offset",
+        "-w",
+        type=int,
+        default=4,
+        help="offset to end of week from Monday (where Monday = 0) "
+        "[default 4 (= Friday)]"
+    )
+
+    parser.add_argument(
         "--year",
         "-y",
         type=int,
         default=datetime.date.today().year,
-        help=("the year to generate dates for [default {y}]".format(
-            y=datetime.date.today().year)))
+        help="the year to generate dates for [default {y}]".format(
+            y=datetime.date.today().year))
 
     args = parser.parse_args()
     # normalise format and style
@@ -136,6 +145,11 @@
                   "ignored for 'iso' style".format(prog=PROG))
 
     elif args.style == "lecture":
+        # --week-offset is irrelevant
+        if args.week_offset:
+            args.week_offset = ""
+            print("{prog}: warning: --week_offset/-w is ignored for 'lecture' "
+                  "style".format(prog=PROG))
         # both --paper and --teaching-period are required
         if not args.paper:
             parser.exit(