mout/src/date/dayOfTheYear.ts

Modular Utilities

/**
 * 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
    );
}

export default dayOfTheYear;