Hindu calendar: lunar months, adhika and kshaya, eras
curl -X POST https://api.astroway.info/v1/vedic/calendar/months \ -H "X-Api-Key: aw_live_..." \ -H "Content-Type: application/json" \ -d '{ "year": 2026, "latitude": 28.6139, "longitude": 77.209, "timezone": "Asia/Kolkata" }'const res = await fetch('https://api.astroway.info/v1/vedic/calendar/months', { method: 'POST', headers: { 'X-Api-Key': process.env.ASTROWAY_API_KEY, 'Content-Type': 'application/json', }, body: JSON.stringify({ "year": 2026, "latitude": 28.6139, "longitude": 77.209, "timezone": "Asia/Kolkata" }),});const { ok, data, error } = await res.json();if (!ok) throw new Error(error.message);console.log(data);import os, requests
r = requests.post( 'https://api.astroway.info/v1/vedic/calendar/months', headers={'X-Api-Key': os.environ['ASTROWAY_API_KEY'], 'Content-Type': 'application/json'}, json={ 'year': 2026, 'latitude': 28.6139, 'longitude': 77.209, 'timezone': "Asia/Kolkata" },)result = r.json()if not result['ok']: raise RuntimeError(result['error']['message'])print(result['data'])<?phpuse GuzzleHttp\Client;
$client = new Client(['base_uri' => 'https://api.astroway.info/v1/']);$r = $client->post('vedic/calendar/months', [ 'headers' => ['X-Api-Key' => getenv('ASTROWAY_API_KEY')], 'json' => [ 'year' => 2026, 'latitude' => 28.6139, 'longitude' => 77.209, 'timezone' => 'Asia/Kolkata', ],]);$result = json_decode($r->getBody(), true);if (!$result['ok']) throw new \RuntimeException($result['error']['message']);print_r($result['data']);The lunar months touching the year: new moon, full moon, next new moon, the Sun’s sidereal sign at the opening new moon, adhika (no sankranti inside) and kshaya (two), and the purnimanta names of both pakshas. Plus the twelve sankrantis with their local moments and the eras: Shaka and Vikram Samvat from Chaitra, Vikram Samvat from Kartika (Gujarat), the sixty-year samvatsara name. 2026 has Adhika Jyeshtha (17 May to 15 June).
Authorizations
Section titled “Authorizations ”Parameters
Section titled “ Parameters ”Query Parameters
Section titled “Query Parameters ”Comma-separated dotted paths, relative to data, to keep in the response. A path is applied to every element of an array, so planets.name means the name of each planet. Paths that match nothing come back in _fields_unmatched; a list where nothing matches at all is a 400, because an empty object would be a confident wrong answer.
Example
planets.name,planets.longitudeRound every non-integer number in the response to this many decimal places. Integers are left alone, because an id is not a measurement. Ecliptic longitudes ship with fourteen decimals by default; 2 is about a tenth of an arcminute.
Example
4Header Parameters
Section titled “Header Parameters ”Unique per logical operation, kept across retries. For 24 hours from the first request, a repeat with the same key, method, path, body and query string returns the stored response with Idempotent-Replayed: true and costs 0 credits. The same key with a different body or query string is a 409 IDEMPOTENCY_KEY_REUSED; a repeat while the first is still running is a 409 IDEMPOTENCY_IN_PROGRESS. Only 2xx responses are kept. See /idempotency/.
Example
01HXY2A7ZM0ABCDEFRequest Body required
Section titled “Request Body required ”A Gregorian year and a place for the lunar months.
object
Gregorian year, 1900 to 2100. Entries are those whose date falls in this year.
Latitude in decimal degrees, north positive. Between -66 and 66: further out the Sun does not rise on some days and a Hindu day has no start.
Longitude in decimal degrees, east positive.
IANA zone name such as Asia/Kolkata, America/New_York or Europe/Kyiv, or auto (default) to look it up from the coordinates. Resolved day by day: each day is read on the offset that zone kept that day, so summer time is followed.
A fixed offset in hours instead of a zone, for the whole year. Ignored when timezone is sent.
Sidereal school by name. Lahiri when omitted. Equivalent to ayanamsaId; send either.
Example
{ "year": 2026, "latitude": 28.6139, "longitude": 77.209, "timezone": "Asia/Kolkata"}Responses
Section titled “ Responses ”Successful calculation
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{ "ok": true, "data": { "year": 2026, "place": { "latitude": 28.6139, "longitude": 77.209, "timezone": "Asia/Kolkata", "timezoneOffset": null, "ayanamsaId": 1 }, "months": [ { "name": "Jyeshtha", "index": 3, "adhika": true, "kshayaOf": null, "label": "Adhika Jyeshtha", "newMoon": "2026-05-17T01:31:00+05:30", "fullMoon": "2026-05-31T14:15:00+05:30", "nextNewMoon": "2026-06-15T08:24:00+05:30", "sunSignAtNewMoon": "Vrishabha", "purnimanta": { "shuklaPaksha": "Adhika Jyeshtha", "krishnaPaksha": "Adhika Jyeshtha" } } ], "adhika": [ "Adhika Jyeshtha" ], "kshaya": [], "eras": { "shaka": { "from": "2026-03-19T06:53:00+05:30", "number": 1948, "note": "Shaka year from Chaitra (Chaitradi); before it, the year is one less." }, "vikramChaitradi": { "from": "2026-03-19T06:53:00+05:30", "number": 2083, "note": "Vikram Samvat counted from Chaitra, North India." }, "vikramKartikadi": { "from": "2026-11-09T12:32:00+05:30", "number": 2083, "note": "Vikram Samvat counted from Kartika, Gujarat: one less than the Chaitradi number until then." }, "samvatsara": { "name": "Parabhava", "note": "Sixty-year cycle name from Chaitra (Ugadi) and Chithirai, as South Indian almanacs give it." } }, "sankrantis": [ { "sign": "Makara", "at": "2026-01-14T15:07:00+05:30" } ], "rule": "A month runs new moon to new moon and is named by the sidereal sign of the Sun at the opening new moon plus one (Sun in Meena: Chaitra). No sankranti inside: adhika, named after the month that follows. Two sankrantis: kshaya, and the next name is skipped." }}Validation error
Example
{ "ok": false, "error": { "code": "INVALID_INPUT", "message": "Validation failed: date: Date must be YYYY-MM-DD", "details": [ { "path": "date", "message": "Date must be YYYY-MM-DD" } ] }}Missing or invalid API key
Example
{ "ok": false, "error": { "code": "INVALID_API_KEY", "message": "Invalid API key" }}