diff --git a/tz.py b/tww.py
similarity index 97%
rename from tz.py
rename to tww.py
index e302455..80c2dd4 100644
--- a/tz.py
+++ b/tww.py
@@ -1,5 +1,8 @@
+#!/usr/bin/env python
 """
+Find time now, in the past or future in any timezone or location.
 """
+
 import os
 import argparse
 import logging
@@ -19,7 +22,7 @@ logger = logging.getLogger()
 
 def parse_args():
     parser = argparse.ArgumentParser()
-    parser.add_argument('query', nargs='*', help="<datetime-like> to <timezone-like or location string>")
+    parser.add_argument('query', nargs='*', default="now", help="<datetime-like> to <timezone-like or location string>")
     parser.add_argument('--format', dest='format', default=DEFAULT_FORMAT)
     parser.add_argument('--iso', dest='iso', action='store_true')
     parser.add_argument('--debug', dest='debug', action='store_true')