function changeTest (zone, i) {
	var until         = moment.utc(zone.untils[i]),
		minutesOffset = zone.offsets[i],
		secondsOffset = Math.round(minutesOffset * 60),
		abbr          = zone.abbrs[i],
		dateTime      = until.format('YYYY-MM-DDTHH:mm:ssZ'),
		hours         = until.clone().subtract(secondsOffset, 'seconds').format('HH:mm:ss');

	if (secondsOffset % 60) {
		minutesOffset = secondsOffset + ' / 60';
	}

	return '["' + dateTime + '", "' + hours + '", "' + abbr + '", ' + minutesOffset + ']';
}
Creates a test for a provided time change (zone.untils[i])