A leap year is a calendar year that contains an additional day added to keep the calendar year synchronized with the astronomical year or seasonal year.

https://leap.deno.dev

Returns if the current year is leap.

Currently(2022) it returns 👇

{ "result": false }

https://leap.deno.dev/2004

Returns if ${YEAR} is a leap year.

{ "result": true }

https://leap.deno.dev/range/1/20

A list with all the leap years from year ${START} to ${END}.

{ "result": [4, 8, 12, 16, 20] }

You can see usage examples (in different languages) in examples/ and in the tests.

• leap_year: Contains the core logic of this API.

Includes a CLI Tool if you are interested.

• leap_years_utils: The logic for the in Range Section.

• Jul 21, 2021: Start, using Express and CommonJS 🎉

The logic to calculate if the year was a leap year was in the router.

• Dec 23, 2021: Move to ESM 🚀

The logic where moved to an NPM package, check-leap-year.

• Jan 31, 2022: Add usage example in different languages 👀

Especially Go, Ruby and Python.

• 24 Mar, 2022: Moved to Deno, using Oak 🐿

The NPM package was deprecated in favor of @ultirequiem/leap-year, which is Deno first but works on Node.js and the browser too 😆

Open an Issue, I will check it a soon as possible 👀

If you want to hurry me up a bit send me a tweet 😆

Consider supporting me on Patreon if you like my work 🙏

Don't forget to start the repo ⭐

Licensed under the MIT License 📄