Not to mention the fact that in the novels, Suzaku meets the vi Britannias before they actually get to the Kururugi Shrine. I don't know if it was actually September when they first met, but it was certainly before April.
But I'm not sure what you mean by "there is no summer there whatsoever". In the novel, Genbu died in April, but the invasion was still on August 10. The next four months were of the kids trying to live as normally as possible and Suzaku changing. The novel uses Lelouch and Nunnally's dialogue to make it clear that Suzaku is now "different". There's still a blissful summer; the difference is whether or not Suzaku's traumatized throughout the entire time, lol.
But in general, I agree with your timeline.
Btw, OP: The Stage 0 novel takes a few liberties with the timeline, but it's the biggest offender by far out of all the novels. Pretty much every other novel fits seamlessly with the canon. (Or at least, I haven't noticed any major discrepancies.) IMO, it's a good reference if you want to read a take on Code Geass characters not named "Lelouch", though I don't think Nunnally has had that much coverage in the novels yet.
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But I'm not sure what you mean by "there is no summer there whatsoever". In the novel, Genbu died in April, but the invasion was still on August 10. The next four months were of the kids trying to live as normally as possible and Suzaku changing. The novel uses Lelouch and Nunnally's dialogue to make it clear that Suzaku is now "different". There's still a blissful summer; the difference is whether or not Suzaku's traumatized throughout the entire time, lol.
But in general, I agree with your timeline.
Btw, OP: The Stage 0 novel takes a few liberties with the timeline, but it's the biggest offender by far out of all the novels. Pretty much every other novel fits seamlessly with the canon. (Or at least, I haven't noticed any major discrepancies.) IMO, it's a good reference if you want to read a take on Code Geass characters not named "Lelouch", though I don't think Nunnally has had that much coverage in the novels yet.