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Determine the number of days in a month.
npm install @stdlib/time-days-in-month
var daysInMonth = require( '@stdlib/time-days-in-month' );
Returns the number of days in a month.
var num = daysInMonth();
// returns <number>
By default, the function returns the number of days in the current month of the current year (according to local time). To determine the number of days for a particular month and year, provide month
and year
arguments.
var num = daysInMonth( 2 );
// returns <number>
num = daysInMonth( 2, 2016 );
// returns 29
num = daysInMonth( 2, 2017 );
// returns 28
A month
may be either a month's integer value, three letter abbreviation, or full name (case insensitive).
var num = daysInMonth( 2, 2016 );
// returns 29
num = daysInMonth( 'feb', 2016 );
// returns 29
num = daysInMonth( 'february', 2016 );
// returns 29
The function also supports providing a Date
object.
var num = daysInMonth( new Date() );
// returns <number>
- 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.
var daysInMonth = require( '@stdlib/time-days-in-month' );
var v;
var i;
for ( i = 0; i < 2021; i++ ) {
v = daysInMonth( 'feb', i );
console.log( 'In the year %d, February has %d days.', i, v );
}
-
@stdlib/time-days-in-month-cli
: CLI package for use as a command-line utility. -
@stdlib/time-days-in-year
: determine the number of days in a year according to the Gregorian calendar.
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.
See LICENSE.
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