Last entry date after automatic revalidation?

I am filling out immigration forms and I need to fill in the my last entry date to US. Well it is a little complicated issue. A few years ago I traveled to Canada for a short visit on an expired F-1 visa and came back using the automatic revalidation rule. When you do that, you do not surrender your I-94 so you do not receive a new one, and hence the travel is not recorded on your passport, though I know the actual date with 90% certainty. I checked old documents and saw that upon an immigration counselor's advice I did not mention that trip, that is I used the date from my previous entry, when I applied for OPT, and that was approved without a glitch. However there will be more scrutiny with a green card application and I really want to make sure that I put the correct date. Yet I called the USCIS with this question and instead of a meaningful answer I got a lesson on importance of being honest in my application. So do I use the actual last reentry date or the date on my passport?

Last entry date after automatic revalidation?
With an automatic revalidation you can use the first entry date. The trip to Canada was not considered a meaniful departure so it is as if it did not happen, thus the revalidation.
Reply:age of computers nothing i lost every action movement is in some government data bank be honest they will run many searches on Ur name and passport you lie there goes any chances be honest you get to explain in details