Kati or Kongali Bihu is the quiet, austere Bihu kept on the first day of the Assamese month of Kati in mid-October, when the granaries are empty and the paddy still stands green. Lamps are lit at the tulasi plant and in the fields, with prayers for the ripening crop.
When: The first day of the Assamese month of Kati — the Kartika sankranti, mid-October
Where: Assamese households and paddy fields throughout Assam
Deity: Tulasi and Lakshmi, invoked for the protection and prosperity of the standing crop
Observance: Earthen lamps (saki) lit at the tulasi plant, granary and fields; akash banti sky-lamps raised on bamboo poles; simple food and prayers
Regional name: Kati Bihu (after the month) · Kongali Bihu ("the Bihu of scarcity")
The Bihu of the lean season
Of Assam's three Bihus, Kati is the one without a feast. Kongali means poor, scanty — and the name describes the season: by mid-October the old harvest is eaten, the granaries stand nearly empty, and the new paddy is still green in the fields, its fate undecided. There is nothing yet to celebrate, everything to pray for. So Kati Bihu turned inward and became a festival of lamps and quiet petition rather than of dance and plenty. Its mood is the counterpoint that gives the other two Bihus their meaning: the anxious hush before Magh Bihu's abundance. Tradition holds the day sacred to the tulasi plant and to Lakshmi as the deity of the crop — the household's plea that the goddess of plenty not pass them by in the critical weeks while the grain fills.
Lamps at the tulasi, lamps in the field
On the sankranti evening that opens the month of Kati, the household cleans the courtyard and the tulasi is freshly planted or trimmed on its earthen platform, the tulasi bheti. As dusk falls, earthen lamps — saki — are lit at the foot of the tulasi, at the granary door, at the gateway and in the garden, and the family offers prayers for the family's wellbeing and the ripening paddy. In the fields, cultivators light lamps along the bunds; the most evocative is the akash banti, the "sky lamp" raised on the tip of a tall bamboo pole, which tradition explains variously — to guide the souls of ancestors, and to draw insects away from the tender crop, a piece of practical wisdom folded into piety. Some farmers whirl a bamboo stem and recite traditional formulas to ward pests and the evil eye from the field. Food is deliberately simple; the month of Kati keeps up the lamp at the tulasi each evening.
Keeping Kati Bihu in Ottawa & Canada
Kati Bihu is the easiest Bihu to keep faithfully in a Canadian home, precisely because it asks for so little: a clean threshold, a tulasi plant and an evening lamp. Many Assamese and other Indian households in Ottawa already keep a potted tulasi indoors — by mid-October it must come in from the cold in any case — and lighting a saki or diya beside it at dusk on the Kartika sankranti, with a simple prayer to Lakshmi for the household's sustenance, is the whole heart of the festival. Families without tulasi light the lamp at the kitchen or altar. The evening is also a natural moment to remember ancestors, echoing the sky-lamp's older meaning, and to teach children why one of Assam's three Bihus celebrates scarcity rather than plenty. Check the sankranti dates on this site's calendar; the same season leads into Kartika's lamp-lighting month observed across Hindu traditions.
Questions
Why is Kati Bihu called Kongali, "the Bihu of scarcity"?
Because it falls in the lean gap of the farming year: the previous harvest is finished and the new paddy is still unripe in the fields. With granaries empty, the festival is kept with lamps and prayers rather than feasting — an observance of hope through a season of want.
What is the akash banti?
The "sky lamp" — an earthen lamp hoisted on a tall bamboo pole at the edge of the paddy field on Kati Bihu. Tradition says it lights the way for departed ancestors, and farmers add the practical reading that it lures insects away from the young crop.
How is Kati Bihu different from the other two Bihus?
Rongali (Bohag) Bihu in April is the exuberant New Year with dance and song; Magh (Bhogali) Bihu in January is the post-harvest feast with bonfires. Kati Bihu in October is austere and devotional — lamps at the tulasi and in the fields, simple food, and prayers for the standing crop.
Source: Agrarian and household tradition of the Assamese people. Regional versions may vary — this text follows the version most widely used in community worship.