Visual Timetabling free software (http://visual.timetabling.free.fr/HYPERLINK) was developed to easily create schedules. It is intended to replace the term CELCAT software used by the University of Evry. The aim of the project is to implement a service in VT synchronous diffusion based on the CalDAV open protocol. The tasks are • Study in depth the operation of VT (write a little documentation would be a plus) to understand how to export schedules to ICS Format • Understand how the CALDAV protocol over HTTP and WebDAV • Prototyping implementing a service schedule based on Caldav output VT