Return the IANA timezone for a given coordinate pair

Get IANA timezone for a coordinate pair. Fully offline — no external API call. Accepts ?latitude=&longitude= and/or ?lat=&lon= (any pair that supplies both coordinates). Examples: ?latitude=19.055&longitude=72.869 (Mumbai), ?lat=19.055&lon=72.869

Endpoint

GET /v1/utils/timezone

Request parameters

Field	Type	Required	Description
latitude	number | null	No	Latitude (alias: lat)
longitude	number | null	No	Longitude (alias: lon)
lat	number | null	No	Alias for latitude
lon	number | null	No	Alias for longitude

Example request

curl

curl -X GET "https://api.asterwise.com/v1/utils/timezone?latitude=19.076&longitude=72.8777" \
  -H "Authorization: Bearer YOUR_API_KEY"

Python

import asterwise
from asterwise.api.utilities_api import UtilitiesApi

configuration = asterwise.Configuration(
    host="https://api.asterwise.com",
    access_token="YOUR_API_KEY",
)

with asterwise.ApiClient(configuration) as client:
    api = UtilitiesApi(client)
    result = api.timezone(latitude=19.076,
    longitude=72.8777)
    print(result)

TypeScript

import { createClient, createConfig, timezone } from 'asterwise';

const client = createClient(createConfig({
  baseUrl: 'https://api.asterwise.com',
  headers: { Authorization: 'Bearer YOUR_API_KEY' },
}));

const result = await timezone({
  client,
  query: {
      "latitude": 19.076,
      "longitude": 72.8777
  },
});

console.log(result.data);

Example response

{
  "success": true,
  "message": "success",
  "data": {
    "latitude": 19.076,
    "longitude": 72.8777,
    "timezone": "Asia/Kolkata"
  }
}

Response fields

Field	Type	Description
success	boolean	True if the request succeeded
message	string	Human-readable status message
data	object
data.latitude	number	Input latitude.
data.longitude	number	Input longitude.
data.timezone	string	IANA timezone identifier.

Errors

Code	Description	Reference
authentication_failed	Missing or invalid API key.	authentication_failed
ephemeris_unavailable	Upstream ephemeris service error.	ephemeris_unavailable
insufficient_tier	API key tier does not include this endpoint.	insufficient_tier
internal_error	Unexpected server error.	internal_error
ip_rate_limit_exceeded	Too many requests in a short window.	ip_rate_limit_exceeded
payload_too_large	Request body exceeds the size limit.	payload_too_large
resource_not_found	Referenced resource was not found.	resource_not_found
validation_error	Request body failed schema validation.	validation_error

Related endpoints

• Resolve a city or place name to latitude, longitude, and timezone