Adjustment of Status - I-485

I calculated my rough estimate for interview date and it works!! I interviewed and approved within my estimated date. Here is my calculation.

1. Find your 'Priority Date' from I-797C notice from USCIS

2. Check USCIS Processing time for YOUR FIELD OFFICE from
https://egov.uscis.gov/cris/processTimesDisplayInit.do
They update each month. Gather two or three months of processing dates.

3. Find 'actual date' from immihelp experiences in YOUR AREA.
http://www.immihelp.com/experience/view-1-3-adjustment_of_status_i485.html
Some people post their 'priority date' and 'interview date'. You may search the dates from your area. In case of "New York City", you search either "new york city", "NYC" or "manhattan".

 ** You'd better have USCIS processing time and actual date from immihelp experiences from YOUR AREA. Please, ignore dates from other cities or states.

4. After you have two or more dates from USCIS and immihelp, you would calculate rough interview date with about +/- two weeks. For example, I have some dates from USCIS and immihelp.

As of 2/29/15: I-485 - 6/2/14
As of 3/31/15: I-485 - 7/12/14
As of 5/31/15: I-485 - 9/12/14
What these dates mean? As of 5/31/2015, the applicant who has priority date of 9/12/2014 has been interviewed.

If your 'priority date' is 11/15/2014, you can expect your interview date around 7/31/2015 plus or minus two weeks. Therefore your expected interview date would be from 7/14 to 8/15/2015.

Thank you so much those who sharing your dates and experience in this board. It really helps me to wait for ten months to get green card. The interview was very short. We are in and out in less than five minutes. The officer did not really ask question and just requested some statements for joint account and some pictures of us. Good luck!!