To be eligible to apply for US naturalization in a US district/state, one must have established and maintained residence for 3 months (but not necessarily being physically present) in that district. How many days does this 3-month requirement represent? Is that 90 days (sometimes 1 month = 30 days, e.g. for the 6-month req is in fact 180 days, not 6 months)? Or a variable amount of days depending on which months the applicant established their residence? Or some other numbers?

  • You answered this question in your own answer to which you linked in this question. What confused you in your own text?
    – littleadv
    May 12, 2022 at 3:52
  • @littleadv my answer says three months. How many days does the 3-month requirement to apply for naturalization in a US district/state represent? May 12, 2022 at 3:52
  • Count the days in the three months relevant.
    – littleadv
    May 12, 2022 at 3:53
  • 2
    How about just not getting yourself into a situation where it even matters whether it's 90 or 91 or 92 days? Submit your application when there is absolutely no question whether you meet the 3 month requirement. May 12, 2022 at 3:53

1 Answer 1


Three months may comprise any number of days between 89 and 93, depending on when you start counting and on whether you count inclusively.

For this purpose, you are eligible to apply on the same day of the month as the day on which you established residence in the district. For example, if you established residence on February 12th, you can apply on May 12th. Whether you consider that to be 89 days or 90 is irrelevant. I don't know how they handle situations where you establish residence at the end of a month that has fewer days then the third month following, but the first of the next month ought to be safe. For example, if you establish residence on November 30th, wait until March 1st.

But really, as Greg Hewgill suggests, stop being so cute. You've been waiting for a few years to naturalize; a few more days isn't going to hurt. Why not just play it safe and wait for the 95th day after you moved or even the 100th day?

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