diff --git a/README.md b/README.md
index afa8d2f..c590902 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,11 @@
-# haskell-cron-test
+# haskell-cron-matcher
+
+Match current time with given cron pattern.
+
+	$ haskell-cron-matcher "10-20 * * * * *"
+
+See return code for result:
+
+* 0 - matched
+* 1 - dismatched
+* 2 - pattern parse error