Good afternoon CDB.A300,
Be advised due to curfew at CDG, you must apply for a runway slot (not atc slot) to COHOR (french airports coordinator). Night runway slots amount are very limited due to noise restrictions and mainly dedicated to cargo flights (FEDEX, Europe Airpost, TNT). You may obtain this on a punctual basis if traffic flow allows. Keep in mind this is absolutely mandatory. In case of non "cleared flight", penalty amount is as much as 12000 euros!!!
Hope it helps.
Tony truand/Flight Dispatch - Europe Airpost/CDG