when my receivers in standby, it works without the leading 0

Code:
	<screen name="StandbySummary" position="0,0" size="132,64">
		<widget source="global.CurrentTime" render="Label" position="0,0" size="120,64" font="Regular;48" halign="center" valign="center">
			<convert type="ClockToText">Format:%l:%M %a %d</convert>