date-parser.html

<link rel="import" href="../bower_components/polymer/polymer.html">
<script type="text/javascript" src="../bower_components/moment/min/moment-with-locales.min.js"></script>

<dom-module id="date-parser">
	<template>
		[[output]]
	</template>
	<script>
		Polymer({
			is: 'date-parser',
			properties: {
				timestamp: {
					type: String,
					value: ''
				},
				format: {
					type: String,
					value: 'DD/MM/YYYY HH:mm'
				},
				output: {
					type: String,
					notify: true,
					computed: '_formatTimestamp(timestamp, format)'
				}
			},
			_formatTimestamp: function(timestamp, format) {
				if (timestamp) {
					output = moment.utc(timestamp).format(format);
				} else {
					output = '-';
				}
				return output;
			}
		});
	</script>
</dom-module>