diff --git a/README.md b/README.md
index 6ded311..37531b4 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ See http://www.pfspear.net/projects/gcalcron for his first version.
  * GCal<->Cron syncs can be run at any given frequency, depending on your desired reactivity
  * Does not rely on permanent Internet connectivity thanks to the 7-days-ahead scheduling
  * Only the new and modified events are downloaded from Google at each run, for minimal bandwidth and latency
- * Timezone/DST aware (relies on time.altzone)
+ * Timezone/DST aware, using datetutil.tz.gettz (new since 2012-01-16)
  * Simple settings file in JSON format
  * No Google password stored
  * DocTests! :-)
@@ -80,7 +80,16 @@ For example, to sync every 10 minutes, run `crontab -e`, and add the following l
 
  * In your Google Calendar, create a single or recurrent event, and list one command per line in the description.
  * Add `+10: ` or `-5: ` at the beginning of the line to add an offset of `+10` minutes or `-5` minutes to the command
+ * Add `end: ` or `end -5: ` at the beginning of the line to add an offset relative to the end of the event
+ * Example:
 
+```bash
+-60: /usr/bin/python /home/automation/heating_on.py
+-10: /usr/bin/python /home/automation/boiler_on.py
+-2: /usr/bin/python /home/automation/boiler_off.py
+/usr/bin/php /root/phpdenon/wakeup.php
+end: /usr/bin/python /home/automation/heating_off.py
+```
 
 ## Development