The Assamese year for a given Gregorian year: the Bihus, the Sankrantis, the eclipses and the pan-Indian festivals as Assam observes them, each resolved to the civil date on which it is actually kept at the place you give.
The Assamese calendar is solar, counted in the Bhaskarabda era and beginning with Bohag at the Sun's entry into Aries. The solar events (the Sankrantis, Bohag, Magh and Kati Bihu, Uruka) and the year's eclipses are computed fresh for your coordinates; the lunar festivals largely share their tithis with the Bengali set and are resolved to the right day using the time of day each observance requires — which is why Kali Puja and Dipabali, one and the same Amavasya, need not land together.
Send `year` with `latitude`, `longitude` and `timezone_as_float`; the place matters because sunrise decides which civil day a tithi is kept on. The response is `{year, events}` where events is a list of `{name, date}` in date order, `date` being a plain YYYY-MM-DD local civil date.
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.