diff --git a/cli.js b/cli.js
new file mode 100755
index 0000000..ec8f16d
--- /dev/null
+++ b/cli.js
@@ -0,0 +1,27 @@
+#!/usr/bin/env node
+'use strict';
+
+var pkg = require('./package.json');
+var currentDayNumber = require('./');
+var argv = process.argv.slice(2);
+
+function help() {
+  console.log([
+    '',
+    '  ' + pkg.description,
+    '',
+    '  Example',
+    '    $ current-day-number',
+    '    47'
+  ].join('\n'));
+}
+
+if (argv.indexOf('--help') !== -1) {
+  return help();
+}
+
+if (argv.indexOf('--version') !== -1) {
+  return console.log(pkg.version);
+}
+
+console.log(currentDayNumber(argv.join('')));
diff --git a/package.json b/package.json
index efdba08..bfebce1 100644
--- a/package.json
+++ b/package.json
@@ -47,6 +47,9 @@
     "year",
     "years"
   ],
+  "bin": {
+    "current-day-number": "cli.js"
+  },
   "license": {
     "type": "MIT",
     "url": "https://github.com/datetime/current-day-number/blob/master/license.md"
@@ -59,4 +62,4 @@
     "mocha": "*",
     "mocha-lcov-reporter": "^0.0.1"
   }
-}
\ No newline at end of file
+}