submission date and time

<p>I tried to find this information online but I got conflicting information so I just want to check here. When a college has a deadline of Jan 1, does it mean I need to submit my application by Dec. 31 no later than 11:59 ET, or does it mean I must submit by Jan 1, no later than 11:59 ET?</p>

<p>January 1 no later than 11:59 ET.</p>