I'm asking this because I have decided to take up a story challenge by MercenaryGrax. It's one where just before Naruto leaves on his trip with Jiraiya Sakura not only gives Naruto a chance but ends up being happily pregnant by him. One of the conditions is that Naruto doesn't know about the baby until he returns. I talked to MG and he agreed to let me not follow all the conditions set because I raised some interesting plot changes.
What I want to know, and this is for my rewrite of Tip Of The Spear, is who is older? Naruto was born in October and Sakura was born in March. My thinking is that Naruto would be the oldest of the Rookie Nine being that a lot of clans had lost their heirs or the entire clan head's household. If that's the case, most of them would be born nine to twelve months after Kurama ran amok as replacements for the heirs that were lost. Sakura was born six months before or after Naruto and I tend to think that Kushina and Mebuki were friends and Mebuki conceived Sakura in response to Kushina's pregnancy. I've seen that reasoning in a couple older stories and it makes sense that most of the R9 would be replacements or in Sasuke's case, as a spare.
Having Naruto older also makes a betrothal between him and Sakura makes sense as there is time for Kushina and Mebuki to convince Minato and Kizashi that it was a good idea. Other than Tip of The Spear I won't say what story that's going to fit into as I'm also working on another challenge fic that's a Naruto/Harry Potter story that has Sakura related to the Boy Who's Manipulated. Anyway, I would like to hear other opinions and arguments on the six month age difference between the two.