Name They count full term as 41 weeks here, so 7 days after the UK EDD. I haven't put my deets on the spreadsheet yet, but I've been using my UK EDD (14 March) even though my French EDD will be 21 March (going by LMP and 9-week scan).
Actually, having said that, the French do confuse matters by using two dating methods, SA + SG. SA means pregnancy age going by LMP (so exactly the same as UK, 11+6 in my case) and SG means pregnancy going by supposed conception date (which would make me 9+6). I have no idea why they use SG, as it's so vague until you have a scan, and it just confuses everyone. For example, last time I went to the GP for nausea, she asked how far along I was, and when I said 7 weeks, at first she thought I meant 7 weeks from conception i.e. 9 weeks and that I would be over the nausea soon 
Last time, on the day I got to 41 weeks, I went to get checked by the MW as recommended. She did something similar to a stretch and sweep IMO because labour started 12 hours later and I had DS on 41+2. Had nothing happened, I would have gone in to be checked on 41+2, 41+4 and then induced on 41+5. Honestly, I quite like this way of counting, as so many women go over their EDD, and the checks once you get to 41 weeks are so regular here I didn't feel worried at all. I'm not sure how it works in the UK re: induction when you're overdue, I imagine it varies from hospital to hospital?
Hope that wasn't too confusing! It took me ages to work it out 1st time around, especially as I had a French and UK app on my phone showing different dates. Sticking to UK apps this time, as the French app just kept telling me to watch my weight - typical!