<p>of your decision to attend their university for fall semester?</p>
<p>For many colleges, it's May 1.</p>
<p>Does that mean postmarked by that date?</p>
<p>I believe that means notified on or before that day, not postmarked. You need to notify them of your decision by May 1st. </p>
<p>May 1st is known as the “common reply date”. Most colleges in the US agreed on this one set date, so that students can make fair decisions - compare financial aid offers - and then decide.</p>
<p>If you need an extension, you can ask for one. But contact them immediately.</p>