POST/api/astro/iskcon_calendar/1 credit

ISKCON calendar

The Vaishnava calendar kept by ISKCON: a full year of Ekadashis, the appearance and disappearance days of the acharyas, and the major festivals, dated by Gaudiya reckoning rather than the general Hindu one. Months carry the twelve names of Vishnu — Madhava, Govinda, Damodara and the rest — the two fortnights are Krishna and Gaura, and years are counted in the Gaurabda era. Pass a year plus latitude, longitude and UTC offset, since the tithi prevailing at local sunrise decides which civil day an observance falls on. The response is {year, events}, and each event is {name, date, masa, paksa, tithi_number, is_adhika, gaurabda_year} — so you get both the Gregorian date and the Vaishnava coordinates that produced it, with is_adhika marking an event in a leap month. The tithi and month arithmetic follows the GCAL specification used by ISKCON's own calendar software, which is deliberately not the sidereal-ephemeris method behind /api/astro/panchanga/; dates can therefore differ by a day from other endpoints here. A year returns several hundred events, so filter or page client-side.

https://yogataraapi.prahlad.app/api/astro/iskcon_calendar/

Test Request

Authentication

Send your key in the X-API-Key header. Keys are server-side credentials — never put one in browser JavaScript or a mobile app.

X-API-Key: yt_live_a1b2c3d4_…
Content-Type: application/json

Request fields

Field	Type	Required	Notes
latitude	number (double)	required	Latitude of the place, in decimal degrees. Positive is north, negative is south. Example: 26.9124 for Jaipur, 40.7128 for New York. Minutes and seconds are not accepted - convert first.
longitude	number (double)	required	Longitude of the place, in decimal degrees. Positive is east, negative is west. Example: 75.7873 for Jaipur, -74.0060 for New York. Note the sign: a missing minus puts New York in China.
timezone_as_float	number (double)	required	UTC offset of the place, in hours, as a decimal. Example: 5.5 for India (UTC+05:30), -5 for New York in winter, 5.75 for Nepal. This is NOT validated against date_time - if the two disagree you get a successful response for the wrong moment, so derive both from the same source. Use the offset in force on that date, not today's: a summer birth in a country with daylight saving needs the summer offset.
year	integer	required	Year of birth as a number, e.g. 1990. Four digits. min 1800 · max 2400

Example request

curl -X POST https://yogataraapi.prahlad.app/api/astro/iskcon_calendar/ \
  -H "X-API-Key: $OCCULT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"latitude":26.9124,"longitude":75.7873,"timezone_as_float":5.5,"year":2026}'

Response

{
  "_truncated": true,
  "_note": "Response shortened for the catalogue.",
  "preview": "{\"data\": {\"year\": 2026, \"events\": [{\"name\": \"Shri Krishna Pushya Abhisheka\", \"date\": \"2026-01-03\", \"masa\": \"Narayana\", \"paksa\": \"Gaura\", \"tithi_number\": 15, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Shri Ramachandra Kaviraja - Disappearance\", \"date\": \"2026-01-07\", \"masa\": \"Madhava\", \"paksa\": \"Krishna\", \"tithi_number\": 5, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Shrila Gopala Bhatta Goswami - Appearance\", \"date\": \"2026-01-07\", \"masa\": \"Madhava\", \"paksa\": \"Krishna\", \"tithi_number\": 5, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Shri Jayadeva Goswami - Disappearance\", \"date\": \"2026-01-08\", \"masa\": \"Madhava\", \"paksa\": \"Krishna\", \"tithi_number\": 6, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Shri Lochana Dasa Thakura - Disappearance\", \"date\": \"2026-01-09\", \"masa\": \"Madhava\", \"paksa\": \"Krishna\", \"tithi_number\": 7, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Shat Tila Ekadashi\", \"date\": \"2026-01-14\", \"masa\": \"Madhava\", \"paksa\": \"Krishna\", \"tithi_number\": 11, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Sarasvati Puja\", \"date\": \"2026-01-23\", \"masa\": \"Madhava\", \"paksa\": \"Gaura\", \"tithi_number\": 5, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Shri Pundarika Vidyanidhi - Appearance\", \"date\": \"2026-01-23\", \"masa\": \"Madhava\", \"paksa\": \"Gaura\", \"tithi_number\": 5, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Shri Raghunandana Thakura - Appearance\", \"date\": \"2026-01-23\", \"masa\": \"Madhava\", \"paksa\": \"Gaura\", \"tithi_number\": 5, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Shrila Raghunatha Dasa Goswami - Appearance\", \"date\": \"2026-01-23\", \"masa\": \"Madhava\", \"paksa\": \"Gaura\", \"tithi_number\": 5, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Shrila Vishwanatha Chakravarti Thakura - Disappearance\", \"date\": \"2026-01-23\", \"masa\": \"Madhava\", \"paksa\": \"Gaura\", \"tithi_number\": 5, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Shrimati Vishnupriya Devi - Appearance\", \"date\": \"2026-01-23\", \"masa\": \"Madhava\", \"paksa\": \"Gaura\", \"tithi_number\": 5, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Vasanta Panchami\", \"date\": \"2026-01-23\", \"masa\": \"Madhava\", \"paksa\": \"Gaura\", \"tithi_number\": 5, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Shri Advaita Acharya - Appearance\", \"date\": \"2026-01-25\", \"masa\": \"Madhava\", \"paksa\": \"Gaura\", \"tithi_number\": 7, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Bhishmashtami\", \"date\": \"2026-01-26\", \"masa\": \"Madhava\", \"paksa\": \"Gaura\", \"tithi_number\": 8, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Shri Madhvacharya - Disappearance\", \"date\": \"2026-01-27\", \"masa\": \"Madhava\", \"paksa\": \"Gaura\", \"tithi_number\": 9, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Shri Ramanujacharya - Disappearance\", \"date\": \"2026-01-28\", \"masa\": \"Madhava\", \"paksa\": \"Gaura\", \"tithi_number\": 10, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Bhaimi Ekadashi\", \"date\": \"2026-01-29\", \"masa\": \"Madhava\", \"paksa\": \"Gaura\", \"tithi_number\": 11, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Varaha Dwadashi\", \"date\": \"2026-01-30\", \"masa\": \"Madhava\", \"paksa\": \"Gaura\", \"tithi_number\": 12, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Nityananda Trayodashi\", \"date\": \"2026-01-31\", \"masa\": \"Madhava\", \"paksa\": \"Gaura\", \"tithi_number\": 13, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Shri Krishna Madhura Utsava\", \"date\": \"2026-02-01\", \"masa\": \"Madhava\", \"paksa\": \"Gaura\", \"tithi_number\": 15, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Shrila Narottama Dasa Thakura - Appearance\", \"date\": \"2026-02-01\", \"masa\": \"Madhava\", \"paksa\": \"Gaura\", \"tithi_number\": 15, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Shri Purushottama Dasa Thakura - Disappearance\", \"date\": \"2026-02-06\", \"masa\": \"Govinda\", \"paksa\": \"Krishna\", \"tithi_number\": 5, \"is_adhika\": false, \"gaurabda_year\": 539}, {\"name\": \"Shrila Bhaktisiddhanta Sarasvati Thakura - Appearance\", \"date\": \"2026-02-06\", \"masa\": \"Govinda\", \"paksa\": \"Krishna\", \"tithi_"
}

Captured from a real call using the exact request above. Results sit under data.

Errors

Metering errors return { "error": "…", "message": "<code>", "is_error": true }. Show error to people and branch on message. See the error reference.