RATP have advised that the metro and RER/SNCF Ilê de France will operate as follows on Sunday 8 April and Monday 9 April 2012.
Thank you for your mail and your interest shown in our network.
Sunday and Easter Monday, public transport RATP and SNCF IdF work on the mode of a typical Sunday.
Please note only certain bus lines operating in Paris on Sunday
Regards
Sabine Ruault
The RATP interactive map is very good and shows closures etc.
http://www.ratp.fr/plan-interactif/