Merge pull request #1134 from 30-seconds/muhammadfawwaz/master

add isLeapYear snippet

snippets/isLeapYear.md

@@ -0,0 +1,17 @@
+---
+title: isLeapYear
+tags: date,beginner
+---
+
+Returns `true` if the given `year` is a leap year, `false` otherwise.
+
+Use `new Date()`, setting the date to February 29th of the given `year` and use `Date.prototype.getMonth()` to check if the month is equal to `1`.
+
+```js
+const isLeapYear = (year) => new Date(year, 1, 29).getMonth() === 1;
+```
+
+```js
+isLeapYear(2019); // false
+isLeapYear(2020); // true
+```