Need to know when it's a new day, i.e., when the time is 00:00:00
<p>I think I read somewhere that there's a system event for when the time changes (each second?) but are there other levels of granularity such as when the hour changes?</p>

<p>I have a <code>TabActivity</code> for a 7 day TV Guide - the indicator for the first (leftmost) always shows 'Today' with the others showing a three-letter day (Mon, Tue, Wed etc) obviously depending on what the day is today.</p>

<p>What I'd like to do is have the activity 'know' when midnight comes so it pops up a 'Re-loading please wait...' <code>ProgressDialog</code> and adjusts the indicator on each tab and the associated tab contents.</p>

<p>Is there a built-in system event that can help or is <code>AlarmManager</code> my best approach?</p>
