define(['../lang/isDate'], function (isDate) {
/**
* return the day of the year (1..366)
*/
function dayOfTheYear(date){
return (Date.UTC(date.getFullYear(), date.getMonth(), date.getDate()) -
Date.UTC(date.getFullYear(), 0, 1)) / 86400000 + 1;
}
return dayOfTheYear;
});