Add OHM2013 activity.

diff --git a/activities.mdwn b/activities.mdwn
index b8a2451..e75f1f8 100644 (file)
--- a/activities.mdwn
+++ b/activities.mdwn
@@ -5,6 +5,13 @@ you are holding a meeting or writing an article about VPNs and also
 mention tinc, please [[tell us|contact]]. If you know of any we have
 not listed here, we would also like to hear about it.
 
+
+### Upcoming events
+
+* [OHM2013](https://ohm2013.org/site/),
+  July 31-August 4, 2013, near Alkmaar, The Netherlands.
+  We are present in the [Milliways village](https://ohm2013.org/wiki/Village:Milliways).
+
 ### Past events
 
 * [Chaos Communication Camp](http://events.ccc.de/camp/2011/),