<p>The deadline is January 1st. So if we send in everything on that day, January 1st, we're good...right?</p>
<p>Yes yes yes. Just be sure you start sending everything in early, because the common app site could very well be moving slowly due to traffic, and sometimes it'll pop up all kinds of errors as you're trying to submit, ESPECIALLY if you're trying to submit at 11:55 pm just because college applications hate you. I speak from experience.</p>