I am trying to figure out when to apply for Citizenship. I understand taking 3 years from the date of gc issue. However, do you take to the account foreign trips and subtract them from 90 days? GC says 03/12/20. Applying to Nader 3 year rule. If 90 days subtracted, can apply starting December 12. However, over these 3 years we traveled abroad for a total of 31 days. Do you subtract only 59 days from 03/12, which takes to the account period that I was out of the country or subtract 90 days and do not take to the account 4 vacation trips out of IS for a total of 31 days?