isLeapYear

Returns true if the given year is a leap year.

A year is a leap year when it is divisible by 4, except century years which must also be divisible by 400.

Available since v2.0.0

Import

import { isLeapYear } from '@helpers4/date';

Signature

isLeapYear(year: number): boolean

Parameters

Parameter	Type	Description
year	number	A full year number (e.g. 2024)

Returns

boolean — true if the year is a leap year

Examples

isLeapYear

isLeapYear(2024) // => true
isLeapYear(2025) // => false
isLeapYear(2000) // => true  (divisible by 400)
isLeapYear(1900) // => false (century, not divisible by 400)

Source

View source on GitHub