localized-dst

localized DST

Determine if a date is in daylight savings time by country/state/city

Motivation

I wasn't able to find a correct library to do the simple task is my date during DST (Daylight Savings Time. Every library was old or unconstistant because I learnt the hard way but not every Country/State/City have the same DST...

This is based on the information of https://www.timeanddate.com/time/dst/

Installation

npm install localized-dst

or

yarn add localized-dst

How to use it

import { isDst } from 'localized-dst';

// DST info for Canada, Québec, Montréal
console.log(
  isDst(new Date('2019-08-14 21:00:00'), {
    location: 'CAN.QUEBEC.MONTREAL'
  })
);
// return true

// DST info for France (Paris)
console.log(
  isDst(new Date('2019-11-28 21:00:00'), {
    location: 'FRA'
  })
);
// return false

Implemented DST data

Country	State	City	Key	Years
Australia	Victoria	Melbourne	AUS.VICTORIA.MELBOURNE	2000-2030
Canada	Quebec	Montreal	CAN.QUEBEC.MONTREAL	1980-2030
	Ontario	Toronto	CAN.ONTARIO.TORONTO	2000-2030
France	Metropole	Paris	FRA.METROPOLE.PARIS	2000-2030
USA	HAWAI		USA.HAWAI	all

How to participate

If you think something is missing or corrupted, please submit a PR to this repo!

Some tools

• You have created your file and want to modify this README, use this tool (https://www.tablesgenerator.com/markdown_tables) to generate/modify the table.