commit - 3465cdd255db647b3603bc089a0607598f89f75d
commit + 7ffeff2546e2356cc1426592c9f7533445ea1c8e
blob - 82a1b1cf05812bd348ef2d9be44dc13e588c3cb3
blob + d0423c53563ac3237a83cfa167c153a28fbc65a6
--- README
+++ README
@@ -53,10 +53,18 @@ circumstances as indicated.
   Urgent items are displayed in red. Use this feature to flag items
   before it becomes too late to act on them.
 
+  An empty time string is allowed and interpreted as zero, in effect
+  marking an item as urgent immediately.
+
 - Items marked with a tag of the form "^T" will be ignored until
   time T. Use this for items that cannot or should not be acted
   on before the given time.
 
+  Postponing takes precedence over urgency, making it easy to specify
+  items that should be done on (but not before) a certain date. E.g.:
+
+      Weekly backup ! ^1764
+
 - Indented (non-comment) lines below an item are interpreted as
   items pending completion of their parent. For each child, a green
   plus sign is appended to the parent item. Pending items are not