diff --git a/Projects/CalDAV b/Projects/CalDAV
index 61da4cb..a3af50c 100644
--- a/Projects/CalDAV
+++ b/Projects/CalDAV
@@ -1,24 +1,62 @@
 ---
-title: A CalDAV server
+title: CalDAV server
 abstract: ![calendar](/static/img/calendar.png)
 ---
 
 ![calendar](/static/img/calendar.png)
 
-This project is funded (likely 04 - 10/2018, two persons) via the [prototype
-fund](https://prototypefund.de/project/robur-io/).
-
-[Wikipedia](https://en.wikipedia.org/wiki/Calendaring_software) says:
-calendaring software is software  that minimally provides users with an
+Calendaring software provides users with an
 electronic version of a calendar. Additionally, the software may provide an
-appointment book, address book, and/or contact list.
+appointment book, address book, or contact list.
 
-[CalDAV](https://en.wikipedia.org/wiki/CalDAV) are the calendaring extension to
-WebDAV (a HTTP-based protocol for data manipulation).
+We implemented a CalDAV server based on MirageOS.  
+[CalDAV](https://en.wikipedia.org/wiki/CalDAV) is a calendaring extension to
+WebDAV, an HTTP-based protocol that allows to read, write and alter files, directories and file properties.
+
+The calendar data can be stored in memory, on disk, or in a
+git repository using [irmin](https://github.com/mirage/irmin).
+We tested interoperability with most common CalDAV clients (DAVdroid on Android, Thunderbird Lightning on Linux/Unix/Windows, Apple
+calendar app on MacOS and iOS).
+
+## How to try the calendar server
+
+There is a live instance for testing available at `calendar.robur.io`.
+There is a test user called `test` with password `password` for your convenience.
+
+If you use MacOS, you need add a new CalDAV account in the calendar app, set it to manual, and enter the above URL, username and password. 
+For iOS you need to add an account in the calendar app, select "other" and then CalDAV.
+Discovery of calendars happens automatically.
+
+If you use Thunderbird Lightning, you need to create a new calendar on the network, select CalDAV as remote calendar format, and enter a full calendar URL, e.g.
+`http://calendar.robur.io/calendars/<username>/calendar`.
+
+If you use DAVdroid, you can enter the short URL like for MacOS.
+Discovery of calendars happens automatically.
+
+## How to host the calendar server yourself
+
+Make sure you have OCaml version `>=4.03.0`, and opam version `>=1.2.2` installed via your operating system.
+Also, you need to install and clone
+```
+opam pin add icalendar https://github.com/roburio/icalendar.git
+opam pin add webmachine https://github.com/roburio/ocaml-webmachine.git#webdav
+git clone https://git.robur.io/caldav.git
+opam pin add caldav caldav/
+opam install --deps-only caldav
+```
+Now you can build the project, add a place for storage, and run the calendar server:
+```
+cd caldav
+make
+mkdir /tmp/calendar
+_build/default/app/caldav_server.exe
+```
+
+Time to add some calendars and fun meetups!
+
+## Funding
+
+This project was funded via the [prototype
+fund](https://prototypefund.de/project/robur-io/). Thanks a lot!
 
-We plan to implement a CalDAV server based on MirageOS.  The data is stored in a
-git repository by using [irmin](https://github.com/mirage/irmin).  We will do
-interoperability testing with widely used clients (Android, Thunderbird, Apple
-iCal).
 
-Expect more updates of this project once it starts.
\ No newline at end of file