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30-seconds-of-code/snippets/isLeapYear.md
2022-12-04 22:20:49 +02:00

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Check for leap year date blog_images/flowering-hills.jpg 2020-02-05T14:00:03+02:00 2020-10-20T23:02:01+03:00

Checks if the given year is a leap year.

  • Use the Date constructor, setting the date to February 29th of the given year.
  • Use Date.prototype.getMonth() to check if the month is equal to 1.
const isLeapYear = year => new Date(year, 1, 29).getMonth() === 1;
isLeapYear(2019); // false
isLeapYear(2020); // true