TimeZoneDB

A simple promise-based (async/await) client library for interacting with TimeZoneDB API with Typescript type definitions.

Install

npm install --save timezonedb

Simple Example

const Tzdb = require('timezonedb').Tzdb;

const tzdb = new Tzdb({
  apiToken: '123abc',
});

const go = async () => {
  const tz = await tzdb.getTimeZoneByZone({ zone: 'America/New_York' });

  console.log(JSON.stringify(tz));
};

  {
    "countryCode": "US",
    "countryName": "United States",
    "zoneName": "America/New_York",
    "abbreviation": "EDT",
    "gmtOffset": -14400,
    "zoneStart": 1552201200,
    "zoneEnd": 1572760799,
    "timestamp": 1553811304,
    "formatted": "2019-03-28 22:15:04",
    "dst": false,
  }

Documentation

Known Limitations

The premium methods (getTimeZoneByCity() and getTimeZoneByIP()) are untested since I don't have a premium account. Pull requests are gladly accepted if you test and the code needs changed.

Class vs request methods

You can either use new Tzdb(TZDBConfig) and use the instance methods or you can import the request functions (e.g. listTimeZones(TZDBConfig, ListTimeZonesRequest) directly). The class is just a wrapper for calling the request functions with the provided config.

For example:

import { Tzdb } from 'timezonedb';

const tzdb = new Tzdb({ apiToken: 'abc123' });

tzdb.getTimeZoneByZone({ zone: 'America/New_York' })
  .then(console.log)
  .catch(console.error);

is equivalent to:

import { getTimeZoneByZone } from 'timezonedb';

const config = { apiToken: 'abc123' };

getTimeZoneByZone(config, { zone: 'America/New_York' })
 .then(console.log)
 .catch(console.error);

Tzdb Class Methods

```ts
class Tzdb {
  listTimeZones(ListTimeZonesRequest) // returns `Promise<TimeZone[]>`
  getTimeZoneByZone(GetTimeZoneRequestByZone) // returns `Promise<TimeZoneDetail>`
  getTimeZoneByPosition(GetTimeZoneRequestByPosition) // returns `Promise<TimeZoneDetail>`
  getTimeZoneByCity(GetTimeZoneRequestByCity) // returns `Promise<TimeZoneDetail[]>`
  getTimeZoneByIP(GetTimeZoneRequestByIP) // returns `Promise<TimeZoneDetail>`
  convertTimeZone(ConvertTimeZoneRequest) // returns `Promise<TimeZoneConversion>`
}
```

Request functions

```ts
import * as tzdb from 'timezonedb';

tzdb.listTimeZones(TZDBConfig, ListTimeZonesRequest) // returns `Promise<TimeZone[]>`
tzdb.getTimeZoneByZone(TZDBConfig, GetTimeZoneRequestByZone) // returns `Promise<TimeZoneDetail>`
tzdb.getTimeZoneByPosition(TZDBConfig, GetTimeZoneRequestByPosition) // returns `Promise<TimeZoneDetail>`
tzdb.getTimeZoneByCity(TZDBConfig, GetTimeZoneRequestByCity) // returns `Promise<TimeZoneDetail[]>`
tzdb.getTimeZoneByIP(TZDBConfig, GetTimeZoneRequestByIP) // returns `Promise<TimeZoneDetail>`
tzdb.convertTimeZone(TZDBConfig, ConvertTimeZoneRequest) // returns `Promise<TimeZoneConversion>`
```

Parameters

• TZDBConfig

  These values can all be set by corresponding environment variables or passed as a config object to the class constructor or the request functions.

  {
    /**
     * Whether to use the premium API (vip.timezonedb.com). Enables `getTimeZoneByCity()` and `getTimeZoneByIP()`
    *
    * Default: false
    *
    * Environment variable:
    * TZDB_API_PREMIUM=TRUE
    */
    premium?: boolean;
  
    /**
     * Whether to use HTTPS to connect to the API
    *
    * Default: true
    *
    * Enviroment variable:
    * TZDB_API_HTTP=FALSE
    */
    https?: boolean;
  
    /**
     * TimeZoneDB host
    *
    * Default: api.timezonedb.com or vip.timezonedb.com (if premium is set)
    *
    * Environment variable:
    * TZDB_API_HOST=api.timezonedb.com
    */
    host?: string;
  
    /**
     * TimeZoneDB Port
    *
    * Default: 443 or 80 (if HTTP is set)
    *
    * Environment variable:
    * TZDB_API_PORT=443
    */
    port?: number;
  
    /**
     * TimeZoneDB API Base Path
    *
    * Default: /v2.1
    *
    * Environment variable:
    * TZDB_API_BASE_PATH=/v2.1
    */
    basePath?: string;
  
    /**
     * TimeZoneDB API Token
    *
    * Default: undefined
    *
    * Environment variable:
    * TZDB_API_TOKEN=123abc
    */
    apiToken?: string;
  
    /**
     * Timeout for TimeZoneDB API calls in milliseconds
    *
    * Default: 5000
    *
    * Environment variable:
    * TZDB_API_TIMEOUT=5000
    */
    timeoutMs?: number;
  }

• ListTimeZonesRequest

  {
    /**
     * Customize the fields to display in response. Use an array of strings or a comma-separated string
     *
     * Options include:
     *
     * countryCode, countryName, zoneName, gmtOffset, timestamp, all (default)
     *
     * See: https://timezonedb.com/references/list-time-zone
     */
    fields?: string | (keyof TimeZone)[];
  
    /**
     * A valid ISO 3166 country code.
     *
     * See https://timezonedb.com/references/list-time-zone
     */
    country?: string;
  
    /**
     * The name of a time zone. Use asterisk (*) for wildcard search
     *
     * See https://timezonedb.com/references/list-time-zone
     */
    zone?: string;
  }

• GetTimeZoneRequestByZone

  {
    /**
     * Customize the fields to display in response. Use an array of strings or a comma-separated string
     *
     * Options include:
     *
     * countryCode, countryName, regionName, cityName, zoneName, abbreviation, gmtOffset,
     * dst, zoneStart, zoneEnd, nextAbbreviation, timestamp, formatted, all (default)
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    fields?: string | (keyof TimeZoneApiDetail)[];
  
    /**
     * Navigate to other page when result is more than 25 records
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    page?: number;
  
    /**
     * Unix time in UTC to retrieve zone information for (used for calculating offsets at a particular time)
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    time?: number;
  
    /**
     * A time zone abbreviation or time zone name
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    zone: string;
  }

• GetTimeZoneRequestByPosition

  {
    /**
     * Customize the fields to display in response. Use an array of strings or a comma-separated string
     *
     * Options include:
     *
     * countryCode, countryName, regionName, cityName, zoneName, abbreviation, gmtOffset,
     * dst, zoneStart, zoneEnd, nextAbbreviation, timestamp, formatted, all (default)
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    fields?: string | (keyof TimeZoneApiDetail)[];
  
    /**
     * Navigate to other page when result is more than 25 records
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    page?: number;
  
    /**
     * Unix time in UTC to retrieve zone information for (used for calculating offsets at a particular time)
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    time?: number;
  
    /**
     * Latitude of a city
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    lat: number | string;
  
    /**
     * Longitude of a city
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    lng: number | string;
  }

• GetTimeZoneRequestByCity (premium and untested)

  {
    /**
     * Customize the fields to display in response. Use an array of strings or a comma-separated string
     *
     * Options include:
     *
     * countryCode, countryName, regionName, cityName, zoneName, abbreviation, gmtOffset,
     * dst, zoneStart, zoneEnd, nextAbbreviation, timestamp, formatted, all (default)
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    fields?: string | (keyof TimeZoneApiDetail)[];
  
    /**
     * Navigate to other page when result is more than 25 records
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    page?: number;
  
    /**
     * Unix time in UTC to retrieve zone information for (used for calculating offsets at a particular time)
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    time?: number;
  
    /**
     * A valid ISO 3166 country code
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    country: string;
  
    /**
     * The name of a city. Use asterisk (*) for wildcard search.
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    city: string;
  
    /**
     * A valid region code of United States
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    region?: string;
  }

• GetTimeZoneRequestByIP (premium and untested)

  {
    /**
     * Customize the fields to display in response. Use an array of strings or a comma-separated string
     *
     * Options include:
     *
     * countryCode, countryName, regionName, cityName, zoneName, abbreviation, gmtOffset,
     * dst, zoneStart, zoneEnd, nextAbbreviation, timestamp, formatted, all (default)
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    fields?: string | (keyof TimeZoneApiDetail)[];
  
    /**
     * Navigate to other page when result is more than 25 records
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    page?: number;
  
    /**
     * Unix time in UTC to retrieve zone information for (used for calculating offsets at a particular time)
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    time?: number;
  
    /**
     * A valid IP address
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    ip: string;
  }

• ConvertTimeZoneRequest

  {
    /**
     * Customize the fields to display in response. Use an array of strings or a comma-separated string
     *
     * Options include:
     *
     * fromZoneName, fromAbbreviation, fromTimestamp, toZoneName, toAbbreviation, toTimestamp, toFormatted, offset
     *
     * See: https://timezonedb.com/references/convert-time-zone
     */
    fields?: string | (keyof TimeZoneConversion)[];
  
    /**
     * A valid abbreviation or name of time zone to convert from
     *
     * See https://timezonedb.com/references/convert-time-zone
     */
    from: string;
  
    /**
     * A valid abbreviation or name of time zone to convert from
     *
     * See https://timezonedb.com/references/convert-time-zone
     */
    to: string;
  
    /**
     * Unix time in UTC to retrieve zone information for (used for calculating offsets at a particular time)
     *
     * See: https://timezonedb.com/references/get-time-zone
     */
    time?: number;
  }

Responses

• TimeZone

  {
    /**
     * Country code of the time zone
     *
     * See https://timezonedb.com/references/list-time-zone
     */
    countryCode: string;
  
    /**
     * Country name of the time zone
     *
     * See https://timezonedb.com/references/list-time-zone
     */
    countryName: string;
  
    /**
     * The time zone name
     *
     * See https://timezonedb.com/references/list-time-zone
     */
    zoneName: string;
  
    /**
     * The time offset in seconds based on UTC time
     *
     * See https://timezonedb.com/references/list-time-zone
     */
    gmtOffset: number;
  
    /**
     * Current local time in Unix time. Subtract `gmtOffset` to get UTC time
     *
     * See https://timezonedb.com/references/list-time-zone
     */
    timestamp: number;
  }

• TimeZoneDetail

  {
    /**
     * Country code of the time zone
     *
     * See https://timezonedb.com/references/list-time-zone
     */
    countryCode: string;
  
    /**
     * Country name of the time zone
     *
     * See https://timezonedb.com/references/list-time-zone
     */
    countryName: string;
  
    /**
     * The time zone name
     *
     * See https://timezonedb.com/references/list-time-zone
     */
    zoneName: string;
  
    /**
     * Abbreviation of the time zone
     */
    abbreviation: string;
  
    /**
     * The time offset in seconds based on UTC time
     *
     * See https://timezonedb.com/references/list-time-zone
     */
    gmtOffset: number;
  
    /**
     * Whether the time zone is in DST at the timestamp
     *
     * See https://timezonedb.com/references/list-time-zone
     */
    dst: boolean;
  
    /**
     * The unix time in UTC when current time zone start (i.e. start of current DST / non-DST period)
     *
     * See https://timezonedb.com/references/list-time-zone
     */
    zoneStart: number;
  
    /**
     * The unix time in UTC when current time zone start (i.e. start of current DST / non-DST period)
     *
     * See https://timezonedb.com/references/list-time-zone
     */
    zoneEnd: number;
  
    /**
     * Current local time in unix time. Subtract `gmtOffset` to get UTC time
     *
     * See https://timezonedb.com/references/list-time-zone
     */
    timestamp: number;
  
    /**
     * Formatted timestamp in `Y-m-d h:i:s` format (e.g. `2019-03-29 03:56:27`)
     *
     * See https://timezonedb.com/references/list-time-zone
     */
    formatted: string;
  
    /**
     * The total number of pages if results exceed 25
     */
    totalPage?: number;
  
    /**
     * The current page when results exceed 25
     */
    currentPage?: number;
  }

• TimeZoneConversion

  {
    /**
     * The time zone name of the origin city
     *
     * See https://timezonedb.com/references/convert-time-zone
     */
    fromZoneName: string;
  
    /**
     * Time zone abbreviation of the origin city
     *
     * See https://timezonedb.com/references/convert-time-zone
     */
    fromAbbreviation: string;
  
    /**
     * Time of the origin city in unix time
     *
     * See https://timezonedb.com/references/convert-time-zone
     */
    fromTimestamp: number;
  
    /**
     * The time zone name of the destination city
     *
     * See https://timezonedb.com/references/convert-time-zone
     */
    toZoneName: string;
  
    /**
     * Time zone abbreviation of the destination city
     *
     * See https://timezonedb.com/references/convert-time-zone
     */
    toAbbreviation: string;
  
    /**
     * Time of the destination city in unix time
     *
     * See https://timezonedb.com/references/convert-time-zone
     */
    toTimestamp: number;
  
    /**
     * Difference in seconds between origin time zone and destination time zone
     *
     * See https://timezonedb.com/references/convert-time-zone
     */
    offset: number;
  
    /**
     * Formatted timestamp in `Y-m-d h:i:s` format (e.g. `2019-03-29 03:56:27`)
     *
     * See https://timezonedb.com/references/convert-time-zone
     */
    toFormatted?: string;
  }

Examples

List Time Zones

import { listTimeZones } from 'timezonedb';

listTimeZones({ apiToken: 'abc123' }, { fields: ['countryCode', 'zoneName'] })
  .then(console.log)
  .catch(console.error);

[
  {
    "countryCode": "AD",
    "zoneName": "Europe/Andorra"
  },
  ...
]

Get Time Zones by Position

import { getTimeZoneByPosition } from 'timezonedb';

getTimeZoneByPosition({ apiToken: 'abc123' }, { lat: '53.123', lng: '-80.123', fields: ['countryCode', 'zoneName'] })
  .then(console.log)
  .catch(console.error);

[
  {
    "countryCode": "AD",
    "zoneName": "Europe/Andorra"
  },
  ...
]

More examples can be found in the /examples folder.