Do adcoms look at the time you submit or the time they recieve?

Colleges and Universities A-Z Columbia University
1

<p>I submitted Part 1 on Sep 12. When I track my application, it appeared they received it on Sep 16. Since their deadline in Nov 1 for ED, when is the deadline for me to submit Part 2?</p>

2

<p>I guess nov 1.</p>

3

<p>nov 1 is the deadline</p>