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daysInYear
Determine the number of days in a year according to the Gregorian calendar.
Installation
npm install @stdlib/time-days-in-yearAlternatively,
- To load the package in a website via a
scripttag without installation and bundlers, use the ES Module available on theesmbranch (see README). - If you are using Deno, visit the
denobranch (see README for usage intructions). - For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the
umdbranch (see README). - To use as a general utility for the command line, install the corresponding CLI package globally.
The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.
To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.
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 365Notes
- 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 );
}CLI
Installation
To use as a general utility, install the CLI package globally
npm install -g @stdlib/time-days-in-year-cliUsage
Usage: days-in-year [options] [year]
Options:
-h, --help Print this message.
-V, --version Print the package version.
Examples
$ days-in-year
<number>For a specific year,
$ days-in-year 2016
366See Also
-
@stdlib/time-days-in-month: determine the number of days in a month.
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.
Community
License
See LICENSE.
Copyright
Copyright © 2016-2024. The Stdlib Authors.
