diff --git a/README.md b/README.md
index 91f79fa5..50bb3484 100644
--- a/README.md
+++ b/README.md
@@ -139,6 +139,7 @@ A curated list of awesome Python frameworks, libraries and software. Inspired by
 * [delorean](https://github.com/myusuf3/delorean/) - A library for clearing up the inconvenient truths that arise dealing with datetimes in Python.
 * [when.py](https://github.com/dirn/When.py) - Providing user-friendly functions to help perform common date and time actions.
 * [moment](https://github.com/zachwill/moment) - A Python library for dealing with dates/times. Inspired by [Moment.js](http://momentjs.com/).
+* [pytz](https://launchpad.net/pytz) - World timezone definitions, modern and historical. Brings the [Olson tz database](http://en.wikipedia.org/wiki/Tz_database) into Python.
 
 ## Text Processing