Rahu Kalamराहुकाल

Rahu Kalam is a window of roughly ninety minutes each day that South Indian tradition in particular treats as inauspicious for beginnings — starting a journey, signing an agreement, or any important first step. It is one of three such periods, alongside Yamaganda and Gulika Kalam, that recur every day on a fixed rotation.

It is found by dividing the daytime — sunrise to sunset — into eight equal parts, and assigning one part to Rahu according to the weekday. The weekday table is fixed by classical convention: on Sunday the eighth part, on Monday the second, on Tuesday the seventh, and so on. Because each part is a fraction of the actual daylight, both the clock time and the length of Rahu Kalam change with the date and the latitude — longer on a long summer day, shorter in winter.

SahiKundli computes the window from the location’s real sunrise and sunset (via the Swiss Ephemeris), not from a fixed ninety-minute block, and reports its start and end in local time. We present it descriptively — as the timing tradition records it — and make no claim about outcomes; it sits alongside Yamaganda, Gulika Kalam, and the auspicious muhurtas on the panchanga as reference information, not instruction. See Day-part timings for the full set and the weekday tables.