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    <p>I think I've come up with a solution.</p> <p>When data is fetched, the following is done... </p> <pre><code>editPrefs.putLong("fetchTime", System.currentTimeMillis()); </code></pre> <p><br /> When the application starts and data is normally requested, it now does..<br> (<strong>Note:</strong> The page is updated daily at "9pm AEDT" - (Australia Eastern Daylight Savings time), and I assume it would change to AEST (Australia Eastern Standard time) when daylight savings ends. "Australia/ACT" is a timezone that goes by these zones)</p> <pre><code>//create calendar date for update threshold based on last fetch time preference Calendar updateThresh = new GregorianCalendar(TimeZone.getTimeZone("Australia/ACT")); updateThresh.setTimeInMillis(prefs.getLong("fetchTime", 0)); //increment day if last fetch was &gt;= 9pm of that day if (updateThresh.get(Calendar.HOUR_OF_DAY) &gt;= 21) updateThresh.add(Calendar.DAY_OF_MONTH, 1); //set time to 9:00:00pm updateThresh.set(Calendar.HOUR_OF_DAY , 21); updateThresh.set(Calendar.MINUTE , 0); updateThresh.set(Calendar.SECOND , 0); //check if current date is before or after if (updateThresh.before(new GregorianCalendar(TimeZone.getTimeZone("Australia/ACT")))) { //update needed (fetch data) } else { //update not needed (show message) } </code></pre> <p>This seems to work fine. I've tested it using a DateFormat set to Australia/ACT and it seems to work... e.g. Making another calendar object that is set to the fetch time and using:</p> <pre><code>DateFormat df = DateFormat.getDateTimeInstance(); df.setTimeZone(TimeZone.getTimeZone("Australia/ACT")); testTextField.setText("Last fetch in East AU time: " + df.format(fetchTime.getTimeInMillis()) + "\nUpdate threshold in East AU time: " + df.format(updateThresh.getTimeInMillis()) ); </code></pre> <p>This shows me consistently correct output even if I play around with the timezone settings on my phone... I'm fairly certain this solution works, so I'll mark it correct/accepted - but if anyone notices an error or has a better suggestion, feel free to contribute! :)</p>
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    1. POAndroid/Java - Set and compare date with offset
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    1. COwhy not make Calendar constant with 9 p.m. australian time and compare current time with that time?
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    2. COIsn't that essentially what I've done? I'm not sure that just "9pm Australian time" would work, since it needs to be either the current or next day...
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