How many days does a month contain for the US customs and border protection when indicating "Out 5 months, 29 days." upon reentry on the passport of a US lawful permanent resident?

Example from https://lawandborder.com/guide-to-reentry-permits/ (mirror):

enter image description here

Out 5 months, 29 days.

  • 2
    Perhaps "5 months" simply means the period of time from the starting date until the same day of the month 5 months later, so it could be a different number of days depending on the exact months.
    – user102008
    Aug 20, 2020 at 0:29
  • Why does this matter? The critical time periods are stated in months, not days. Aug 20, 2020 at 23:08
  • @PatriciaShanahan sometimes stated in days, since months are unclear. Aug 20, 2020 at 23:17

1 Answer 1


How many days does a month contain?

Different months contain different numbers of days. Five months plus 29 days can be anywhere from 179 days to 182 days.

  • Thanks, I was hoping that the US customs and border protection agents followed some guidelines. But perhaps you are correct. Aug 20, 2020 at 19:22
  • @FranckDernoncourt if you look online for six-month admission stamps you'll see that the "until" date is obtained by adding six months to the date of entry and subtracting one day. But in any event it doesn't matter what the officer writes in the passport, which could be the result of a miscalculation. What matters are the actual dates of departure and return.
    – phoog
    Aug 20, 2020 at 19:56

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.