The chain of websites for CGR Cinemas seem to include notices about some previews of Un jour mon père viendra taking place in select French cities in early December; here are some promo ads. The first is for a screening in the Angoulême region on December 5, and the second for Narbonne on December 8; both will have Olivia Ruiz and director Martin Valente in attendance:
Where this gets confusing is that right now, there doesn't seem to be any further link to where you can book tickets for either of these screenings; one of the links I clicked took me to a page that was clearly a listing for the movie but with no available purchase info yet. So I'm not sure if you can actually buy tickets for it yet, but wanted to make sure you lucky French peeps knew this was happening. ;) Maybe make some phone calls and see what else you can find out! If you get any news about when tix are available, or any other screenings taking place that week, please post away in the comments below.
EDIT: There's another screening in Carcassone on 15 December; details HERE.