lib/linearcalendar.js
function getDate(ymValue) {
	checkNumber(ymValue)
	var utcFullYear = Math.floor(ymValue / monthsPerYear) + zeroUtcFullYear
	var utcMonth = modFix(Math.floor(ymValue), monthsPerYear) + zeroUtcMonth
	return new Date(Date.UTC(utcFullYear, utcMonth))
}
function getDate(ymValue) {
	checkNumber(ymValue)
	var utcFullYear = Math.floor(ymValue / monthsPerYear) + zeroUtcFullYear
	var utcMonth = modFix(Math.floor(ymValue), monthsPerYear) + zeroUtcMonth
	return new Date(Date.UTC(utcFullYear, utcMonth))
}
function getDate ( ymValue ) { checkNumber ( ymValue ) var utcFullYear = Math . floor ( ymValue / monthsPerYear ) + zeroUtcFullYear var utcMonth = modFix ( Math . floor ( ymValue ) , monthsPerYear ) + zeroUtcMonth return new Date ( Date . UTC ( utcFullYear , utcMonth ) ) }
convert linearValue to Date object
convert linearValue to Date object