When exactly is ED Agreement due?

<p>So I, like many people, freaked out this morning when I was trying to send my ED Northwestern Application in and found out that I still had to have my guidance counselor sign my ED Agreement. I sent everything in, including application fees, but am still missing my counselor signiture on that one small thing. I can easily get that signiture tomorrow and I'm doing it electronically. However, I've been looking around at related posts and some people have been saying that colleges are accepting things postmarked by November 2nd because today is Sunday. Is this true for all schools? Or am I really really screwed?</p>