daKmoR

<div class="itemsListYearMonth">
	<a:groupedForDateTime each="{items}" as="itemsByYear" groupBy="start" format="Y" groupKey="year">
		<a:groupedForDateTime each="{itemsByYear}" as="itemsByMonth" groupBy="start" format="m" dateTimeKey="month">
			<div class="yearMonth clearfix">
				<div class="timeframe" data-behavior="FixTimeframe">
					{month -> f:format.date(format: 'F Y')}
				</div>
				<f:for each="{itemsByMonth}" as="item">
					<div class="item">
						<p class="startEnd"><a:format.duration start="{item.start}" end="{item.end}" /></p>