The actual citizenship interview is usually scheduled within about 6 months of the application.
The ceremony itself will probably be about an hour, but it may not start until 2-3 hours after the time posted on the invitation letter (once again, this may vary greatly).*The ceremony is an official court proceeding. Passport at the ceremony itself if agents are available.
She should get a notice for her naturalization interview appointment within 3-5 months.
The interview itself usually happens within 5-6 months of the initial application.
There is one final step once you’ve gone through all of this: naturalization. There are three things I would advise you to keep in mind: complicated than some of the previous steps.
Here are a few of the steps I have already discussed in previous posts: visa is a little different, but steps 2-5 are part of everyone’s immigration who comes to the USA to be with his/her fiancee/spouse. You may be planning to move, expecting a baby, or other events that would make the timing less than idea.