diff --git a/README.md b/README.md
index 7eb7820..86f7d6f 100644
--- a/README.md
+++ b/README.md
@@ -3,11 +3,12 @@ Find time now, in the past or future in any timezone or location.
 
 ## Usage
 ```
-python tz.py HUMAN_TIME [HUMAN_TZ_LOC]
+python tz.py HUMAN_TIME [HUMAN_TZ_LOC] [--format="%Y-%m-%d %H:%M:%S%z"]
 ```
 
 * `HUMAN_TIME` - is any time or time-like string. See the [dateparser](https://pypi.org/project/dateparser/) for example `10:15`, `now`, `in 3 hours` and many others.
 * `HUMAN_TZ_LOC` - (optional) is either timezone to which the date should be translated (fast) or a location (slow - and requires internet connection to resolve the location). Uses [geopy](https://geopy.readthedocs.io/en/stable/) for location resolution and [timezonefinder](https://pypi.org/project/timezonefinder/) for timezone resolution.
+* `--format` is the format of the time to be displayed. See supported [datetime formats](https://docs.python.org/3/library/datetime.html#strftime-strptime-behavior)
 
 You could alias the whole command to `tww` for faster typing, e.g. in your `.bashrc`:
 
@@ -34,21 +35,36 @@ pip install -r requirements.txt
 Without timezone/location:
 
 ```
-tww now
+$ tww now
+2019-03-13 15:04:36.607080
+```
+
+Time now in another timezone
+```
+$ tww now CET
+2019-03-13 23:07:54.957743
+```
+
+One hour from now in UTC, showing only the time:
+```
+$ tww "in 1 hour" utc --format="%T"
+23:17:49
 ```
 
 With timezone:
 ```
-tww now cet
+$ tww now Asia/Tokyo
+2019-03-14 07:06:35.273192
 ```
 
-Time in timezone:
+Another time in timezone:
 ```
-tww 15:10 cet
+$ tww 15:10 cet
+2019-03-13 23:10:00
 ```
 
-Time in location:
-```
-tww "3/14 15 9:26:53 PST" sofia
+Time in location (**slow!**):
 ```
+$ tww "3/14 15 9:26:53 PST" sofia
+2015-03-14 19:26:53+02:00
 ```
diff --git a/tz.py b/tz.py
index 9631765..9c18b3b 100644
--- a/tz.py
+++ b/tz.py
@@ -5,8 +5,9 @@ from pytz.exceptions import UnknownTimeZoneError
 
 
 parser = argparse.ArgumentParser()
-parser.add_argument('human_dt')
-parser.add_argument('human_tz', nargs='?')
+parser.add_argument('human_dt', help="datetime-like string")
+parser.add_argument('human_tz', nargs='?', help="timezone-like or location string")
+parser.add_argument('--format', dest='format', default='%Y-%m-%d %H:%M:%S%z')
 args = parser.parse_args()
 
 human_dt = args.human_dt
@@ -34,4 +35,9 @@ except UnknownTimeZoneError:
     loc_tz = tzf.timezone_at(lng=location.longitude, lat=location.latitude)
     result = dateparser.parse(human_dt, settings={'TO_TIMEZONE': loc_tz})
     
-print(result)
+if result is None:
+    print("Could not parse '{human_dt}' or '{human_tz}'".format(human_dt, human_tz))
+    exit(1)
+
+formatted_result = result.strftime(args.format)
+print(formatted_result)