Setsuna has THREE days. A small portion of Day One involves him and Sara. Do I really need to elaborate on this? They are alone on Earth. You do the math.
BUT not long afterward, camp decides to cheat with vacation and back to the timeline they go. Well, in a matter of speaking, since Setsuna comes to right about when everything's gone to shit and they're all wandering around Eden. After the deaths of both Kira and Katou, which he already knows about and has fun VERY REALISTIC dreams about while he's stuck in time line limbo. Note, this is pretty much the same style I used to update Lelouch. It's like a merge of the two time lines and alternate dimensions, with everything still happening. Sort of. Yeah yeah, it makes no sense.
Anyway, everything that happened after the Eden point in canon also happened in real-time for him. So lots of fun attacking God and saving the world and Sara and stuffs. Conclusion: Setchan is updated to the end of canon. Yay. If this made even less sense than I thought, leave a note and I will try to clarify. Sob.
As for Sara's latter part of her vacation...
Because of the aforementioned update, I am assuming threads Setsuna has had this week were BEFORE vacation. Humor me. I'll do something legit with this sometime this weekend. Maybe.