Years

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Leap year checks in PHP, Java and JavaScript: namespace Timely\Years, Java package timely.years.

Helper

The same class and method names in every language:

• Helper.php, Helper.java and YearHelper.js (Timely.Helper, see JavaScript).
• isLeap(year): Checks if the year is leap using the Gregorian rules (divisible by 4, except centuries not divisible by 400).
• isLeap2(year): The same using a library function (java.time.Year.isLeap() in Java, Converter in JavaScript, date("L") in PHP).

use Timely\Years\Helper;

Helper::isLeap(2000); // true
Helper::isLeap(1900); // false

Timely.Helper.isLeap(2024); // true

Try it in the Examples (examples/years.html).