International Fixed Calendar

IFC is an npm package for simple handling of date and time (based on gregorian calendar) conversion to international fixed calendar date and time within your project.

Installation

Use the package manager npm to install @volazy/ifc.

npm install @volazy/ifc

Usage

const { IFCDate } = require('@volazy/ifc');
//import { IFCDate } from '@volazy/ifc';

// Current utc time -> 2023-02-19T03:01:55.293Z
console.log( new IFCDate().toISOString() );

// Utc time of timestamp -> 2023-02-19T03:01:55.293Z
console.log( new IFCDate(1676516515293).toISOString() );

// Utc time of gregorian calendar string -> 2023-02-19T03:01:55.000Z
console.log( new IFCDate('February 16, 2023 03:01:55').toISOString() );

// Utc time of gregorian calendar input -> 2023-02-19T03:01:55.293Z
console.log( new IFCDate(2023, 1, 16, 3, 1, 55, 293).toISOString() );

// Utc time of Date or IFCDate object -> 2023-02-19T03:01:55.293Z
console.log( new IFCDate( new Date(2023, 1, 16, 3, 1, 55, 293) ).toISOString() );


// Leap- and Year Day support -> 2024-06-29T03:02:04.004Z
console.log( new IFCDate(2024, 5, 17, 3, 2, 4, 4).toISOString() );
// Leap- and Year Day support -> 2024-LD 03:02:04.004
console.log( new IFCDate(2024, 5, 17, 3, 2, 4, 4).toUTCString() );

// Add/Subtract Time -> returns timestamp example: 1676685715293
const ms = require('ms'); // It's on you how you convert your time to milliseconds
console.log( new IFCDate(2023, 1, 16, 3, 1, 55, 293).addTime( ms('2d') ) );

Information

• Except for a timestamp or IFC-/Date object, all inputs must be based on gregorian calendar.
• .toISOString() returns an ISO styled string.
• .getMonth() and .getUTCMonth() returns the month index (0-12).
• .getDate() and .getUTCDate() returns 1-28 (29 if leap/year day).
• .getDay() and .getUTCDay() returns the day index (0-6, 7* Year Day, 8* Leap Day).
• LD (Leap Day) and YD (Year Day) are special weekend days in the year.

CLI

Looking for an CLI? Check out the cli this package is based on!

• ifc-cli by @gauravnumber