谢谢8老师，这真是一个好消息。不过你说的这个4年零一天是根据什么得出来的呢？我看了USCIS上的要求是
5 years as a Permanent Resident without leaving the United States for trips of 6 months or longer. 根据这个我确实是要9/12/2017年才符合条件，但是我可以提前90天提出申请，那样也是2017年6月才能寄啊。
-There is a rule called "Four years and one day" which applies to your case. Read the following at:
https://www.gpo.gov/fdsys/pkg/CFR-2012-title8-vol1/xml/CFR-2012-title8-vol1-sec316-5.xml
(ii) For period in excess of one (1) year. Unless an applicant applies for benefits in accordance with § 316.5(d), absences from the United States for a continuous period of one (1) year or more during the period for which continuous residence is required under § 316.2 (a)(3) and (a)(5) shall disrupt the continuity of the applicant's residence. An applicant described in this paragraph who must satisfy a five-year statutory residence period may file an application for naturalization four years and one day following the date of the applicant's return to the United States to resume permanent residence. An applicant described in this paragraph who must satisfy a three-year statutory residence period may file an application for naturalization two years and one day following the date of the applicant's return to the United States to resume permanent residence.
