Sorry to bother everyone one with regulation. This is not my cup of tea but I prefer to give approriate references.
Yes, these are EU rules (and not only french ones) :
Day-VFR rules are in the Annex of the 923/2012 regulation, in article SERA.2005(f)
=> those rules are EU-wide
Night-VFR rules are in SERA.2005(c)(5)
=> night rules are defined on a local basis, but the figures mentioned are default one
("VFR flight at night shall be flown at a level which is not below the minimum flight altitude established by the State whose territory is overflown, or, where no such minimum flight altitude has been established: (...)"
=> The only french-specific is that over non-montainous areas, the minimum level is set to 1500 ft, whereas EU defaut rule is only 1000 ft (over montainous areas, the limit is the same : 2000ft)
Back from legal things to much more fun ones (flying !), my problem is not setting the appropriate value in SD, it is that when planning I need to modify back and forth between day or night rules, overwise I have a lot of alerts (when night flying with day settings) or no alert at all while it should (day flight with night settings).
And I do not want to set a night/day setting and have to add/substract 500 or 1000 ft in the sky... things must be simple and set on the ground when planning, not while flying !
To me obstacle clearance is something important, and I'm looking for something easy, for every kind of VFR flight. That's what SD is good at, so I ask if such day/night setting is possible or not.
thanks for reading,