Originally Posted by
anabolism
I agree the term "12 months" is vague. AA also insisted that the last flight (not just the last sequence of flights) must depart the day before the one year mark. Interestingly, the AA RTW desk was happy to have the last flight depart on the one-year mark, but ticketing refused to issue it.
I can understand that. Count one year from, say, January 1, 2018. The year ends on December 31, 2018. January 1, 2019 is the first day of the next year.
I don't think that "12 months" is vague at all. It's the same as my example immediately above. January 1, 2019 is the first day of the 13th month, not the last day of the twelfth.
And I apply the same logic to 365 days. That's even easier! Use Excel to put a date in and add 36
4 to it. (If you add 365, you will be at the 366th day.)