Flex: Add or subtract days from date

It's been a long time since I've posted anything! Possibly because I haven't been doing much development recently :(

Anyway I needed to be able to subtract a day from today's date in Flex, so that I could default one DatePicker field to today and a second DatePicker to yesterday's date.

Turns out it's pretty easy.

Today's date:
<pre class="brush: html">
<mx:DateField id="endDate" width="150" formatString="MM/DD/YYYY" showToday="true" styleName="Date" yearNavigationEnabled="true" editable="true" selectedDate="{new Date()}"/>
</pre>


Yesterday:
<pre class="brush: html">
<mx:DateField id="startDate" width="150" formatString="MM/DD/YYYY" showToday="true" styleName="Date" yearNavigationEnabled="true" editable="true" selectedDate="{DateUtils.addDays(new Date(),-1)}"/>
</pre>

In my project, DateUtils refers to org.as3commons.lang.DateUtils