Most of the (many) R areas in north-eastern France are not active on weekends. On weekdays they have clearly defined activity time-slots.
It is however good to check beforehand the NOTAMs and the little booklet issued by the DGAC that includes all you need to know on french R, P, and D.
If you don’t know the name of the area just ask the agent you are in contact with to tell you the actual code, they are usually happy to help. Just make sure you are always talking to someone (SIVs) in France also outside controlled airspace.
Ok well all of this was off-topic but I read a lot about it on the forum and it is really much simpler than it looks on the map (I am based in LFST).
