countries-and-timezones

Minimalistic library to work with countries and timezones data. Updated with the IANA timezones database.

Usage

NodeJS

Install with npm or yarn:

npm install --save countries-and-timezones

Browser

Add the following script to your project (only ~9kb):

<!-- Latest version -->
<script src="https://cdn.jsdelivr.net/gh/manuelmhtr/countries-and-timezones@latest/dist/index.min.js" type="text/javascript"></script>

<!-- Or specify a version -->
<script src="https://cdn.jsdelivr.net/gh/manuelmhtr/countries-and-timezones@v3.2.1/dist/index.min.js" type="text/javascript"></script>

<!-- This will export a variable named "ct": -->
<script type="text/javascript">
  var data = ct.getCountry('MX');
  console.log(data);
</script>

API

.getCountry(id)

Returns a country referenced by its id.

Example

const ct = require('countries-and-timezones');

const country = ct.getCountry('DE');
console.log(country);

/*
Prints:

{
  id: 'DE',
  name: 'Germany',
  timezones: [ 'Europe/Busingen', 'Europe/Berlin' ]
}

*/

.getTimezone(name)

Returns a timezone referenced by its name.

Example

const ct = require('countries-and-timezones');

const timezone = ct.getTimezone('America/Los_Angeles');
console.log(timezone);

/*
Prints:

{
  name: 'America/Los_Angeles',
  countries: [ 'US' ],
  utcOffset: -480,
  utcOffsetStr: '-08:00',
  dstOffset: -420,
  dstOffsetStr: '-07:00',
  aliasOf: null
}

*/

.getAllCountries()

Returns an object with the data of all countries.

Example

const ct = require('countries-and-timezones');

const countries = ct.getAllCountries();
console.log(countries);

/*
Prints:

{
  AD: {
    id: 'AD',
    name: 'Andorra',
    timezones: [ 'Europe/Andorra' ]
  },
  AE: {
    id: 'AE',
    name: 'United Arab Emirates',
    timezones: [ 'Asia/Dubai' ]
  },
  AF: {
    id: 'AF',
    name: 'Afghanistan',
    timezones: [ 'Asia/Kabul' ]
  },
  AG: {
    id: 'AG',
    name: 'Antigua and Barbuda',
    timezones: [ 'America/Antigua' ]
  },
  ...
}

*/

.getAllTimezones()

Returns an object with the data of all timezones.

Example

const ct = require('countries-and-timezones');

const timezones = ct.getAllTimezones();
console.log(timezones);

/*
Prints:

{
  'Africa/Bamako': {
    name: 'Africa/Bamako',
    countries: [ 'ML' ],
    utcOffset: 0,
    utcOffsetStr: '+00:00',
    dstOffset: 0,
    dstOffsetStr: '+00:00',
    aliasOf: 'Africa/Abidjan'
  },
  'Africa/Banjul': {
    name: 'Africa/Banjul',
    countries: [ 'GM' ],
    utcOffset: 0,
    utcOffsetStr: '+00:00',
    dstOffset: 0,
    dstOffsetStr: '+00:00',
    aliasOf: 'Africa/Abidjan'
  },
  'Africa/Conakry': {
    name: 'Africa/Conakry',
    countries: [ 'GN' ],
    utcOffset: 0,
    utcOffsetStr: '+00:00',
    dstOffset: 0,
    dstOffsetStr: '+00:00',
    aliasOf: 'Africa/Abidjan'
  },
  ...
}

*/

.getTimezonesForCountry(id)

Returns an array with all the timezones of a country given its id.

Example

const ct = require('countries-and-timezones');

const timezones = ct.getTimezonesForCountry('MX');
console.log(timezones);

/*
Prints:

[
  {
    name: 'Mexico/BajaSur',
    countries: [ 'MX' ],
    utcOffset: -420,
    utcOffsetStr: '-07:00',
    dstOffset: -360,
    dstOffsetStr: '-06:00',
    aliasOf: 'America/Mazatlan'
  },
  {
    name: 'Mexico/General',
    countries: [ 'MX' ],
    utcOffset: -360,
    utcOffsetStr: '-06:00',
    dstOffset: -300,
    dstOffsetStr: '-05:00',
    aliasOf: 'America/Mexico_City'
  },
  {
    name: 'America/Ensenada',
    countries: [ 'MX' ],
    utcOffset: -480,
    utcOffsetStr: '-08:00',
    dstOffset: -420,
    dstOffsetStr: '-07:00',
    aliasOf: 'America/Tijuana'
  },
  ...
}

*/

.getCountriesForTimezone(name)

Returns a list of the countries that uses a timezone given its name. When a timezone has multiple countries the first element is more relevant due to its geographical location.

Example

const ct = require('countries-and-timezones');

const timezone = ct.getCountriesForTimezone('Europe/Zurich');
console.log(timezone);

/*
Prints:

[
  {
    "id": "CH",
    "name": "Switzerland",
    "timezones": [
      "Europe/Zurich"
    ]
  },
  {
    "id": "DE",
    "name": "Germany",
    "timezones": [
      "Europe/Busingen",
      "Europe/Berlin",
      "Europe/Zurich"
    ]
  },
  {
    "id": "LI",
    "name": "Liechtenstein",
    "timezones": [
      "Europe/Vaduz",
      "Europe/Zurich"
    ]
  }
]

*/

.getCountryForTimezone(name)

Returns a the most relevant country (due to its geographical location) that uses a timezone given its name.

Example

const ct = require('countries-and-timezones');

const timezone = ct.getCountryForTimezone('Europe/Zurich');
console.log(timezone);

/*
Prints:

{
  "id": "CH",
  "name": "Switzerland",
  "timezones": [
    "Europe/Zurich"
  ]
}

*/

Data models

Country

A country is defined by the following parameters:

Parameter	Type	Description
id	String	The country ISO 3166-1 code.
name	String	Preferred name of the country.
timezones	Array[String]	The list of timezones used in the country.

{
  id: 'MX',
  name: 'Mexico',
  timezones: [
    'Mexico/BajaSur',
    'Mexico/General',
    'America/Ensenada',
    'America/Santa_Isabel',
    'Mexico/BajaNorte',
    'America/Bahia_Banderas',
    'America/Cancun',
    'America/Chihuahua',
    'America/Tijuana',
    'America/Hermosillo',
    'America/Matamoros',
    'America/Mazatlan',
    'America/Merida',
    'America/Mexico_City',
    'America/Monterrey',
    'America/Ojinaga'
  ]
}

Timezone

A timezone is defined by the following parameters:

Parameter	Type	Description
name	String	The name of the timezone, from tz database.
countries	[String]	A list of ISO 3166-1 codes of the countries where it's used. Etc/*, GMT and UTC timezones don't have associated countries.
utcOffset	Number	The difference in minutes between the timezone and UTC.
utcOffsetStr	String	The difference in hours and minutes between the timezone and UTC, expressed as string with format: ±[hh]:[mm].
dstOffset	Number	The difference in minutes between the timezone and UTC during daylight saving time (DST). When utcOffset and dstOffset are the same, means that the timezone does not observe a daylight saving time.
dstOffsetStr	String	The difference in hours and minutes between the timezone and UTC during daylight saving time (DST, expressed as string with format: ±[hh]:[mm].
aliasOf	String	The name of a primary timezone in case this is an alias. null means this is a primary timezone.

{
  name: 'Asia/Tel_Aviv',
  countries: [ 'IL' ],
  utcOffset: 120,
  utcOffsetStr: '+02:00',
  dstOffset: 180,
  dstOffsetStr: '+03:00',
  aliasOf: 'Asia/Jerusalem'
}

Related projects

• countries-db: Minimalistic lib with countries data.
• location-by-ip: Get the location of any IP address.

Sponsors

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License

MIT