@stdlib/time-days-in-year NPM

daysInYear

Determine the number of days in a year according to the Gregorian calendar.

Installation

npm install @stdlib/time-days-in-year

Usage

var daysInYear = require( '@stdlib/time-days-in-year' );

daysInYear( [value] )

Returns the number of days in a year according to the Gregorian calendar.

var num = daysInYear();
// returns <number>

By default, the function returns the number of days in the current year (according to local time). To determine the number of days for a particular year, provide either a year or a Date object.

var num = daysInYear( new Date() );
// returns <number>

num = daysInYear( 2000 );
// returns 366

num = daysInYear( 2017 );
// returns 365

Notes

The function's return value is a generalization and does not take into account inaccuracies due to daylight savings conventions, crossing timezones, or other complications with time and dates.

Examples

var daysInYear = require( '@stdlib/time-days-in-year' );

var v;
var i;

for ( i = 0; i < 2021; i++ ) {
    v = daysInYear( i );
    console.log( 'The year %d has %d days.', i, v );
}

Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.