leap-year
Check if a year is a leap year, that’s a calendar year that contains an additional day added to keep the calendar year synchronized with the astronomical year or seasonal year.
Usage
Deno 🦕
import { isLeapYear } from "https://deno.land/x/leap_year/mod.ts";
isLeapYear(2014); //=> false
isLeapYear(2016); //=> true
isLeapYear("6 October 2006 00:07:00 GMT"); //=> false
isLeapYear("2000"); //=> false
isLeapYear(new Date(2016, 1, 1)); //=> true
isLeapYear("13 December 400 00:07:00 GMT", true); //=> { year: 400, result: true }
Node.js 🐢🚀
import { isLeapYear } from "@ultirequiem/leap-year";
Browser 🌐
You can use any CDN 🔥
Eg. ESM ▶ SkyPack / script tag ▶ JSDelivr.
The API is the same on all this platforms.
API
CLI Tool
Was done mainly as usage example.
Install
- Node.js 🦍
npm install -g @ultirequiem/leap-year
- Deno 🦕
deno install https://deno.land/x/leap_year/leap-year.ts
Usage
leap-year "13 October 2020 00:07:00 GMT" 400 345
true
true
false
Or with the verbose flag 👇
leap-year "13 October 2020 00:07:00 GMT" 400 345 --verbose # -v
2020 is a leap year.
400 is a leap year.
345 is not a leap year.
Related
-
leap_year_utils: Utilities around this package.
-
parse_datelike: Parse a number/string/date to a number/string/date.
-
leap-year-api: A REST API to know if a year is leap or not.
Support
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 star the repo ⭐
Versioning
We use Semantic Versioning. For the versions available, see the tags 🏷️
Licence
Licensed under the MIT License 📄