What is Rahu Kalaya?
Rahu Kalaya (Rahu Kalam) is a period in Hindu astrological tradition that some people consider when planning important activities. It is not a measure of physical risk or a scientific prediction.
Rahu Kalaya Calculator — Today & 7 Days
Calculate today's Rahu Kalaya in Sri Lanka using local sunrise and sunset, or choose a date and city for a seven-day schedule.
Uses the approximate centre of the selected city.
How the times are calculated
Why times differ
Daylight length changes during the year, and solar times differ by longitude and latitude. This calculation assumes a level, unobstructed horizon, standard atmospheric refraction and the sun's apparent upper edge. Hills, weather, elevation and local almanac conventions can produce different times.
Cultural context
This is an informational astronomical calculation of a traditional time period, not a certified religious almanac or an official government timetable. Practices and preferred conventions may vary.
The time from local sunrise to sunset is split into eight equal parts. The weekday selects one part: Sunday 8, Monday 2, Tuesday 7, Wednesday 5, Thursday 6, Friday 4, Saturday 3. Sunrise and sunset are calculated for each selected date and city.
Times are approximate astronomical calculations, rounded to the nearest minute; they are not almanac-certified.
Frequently asked questions
Is Rahu Kalaya always 90 minutes?
No. It is one eighth of the daylight interval, so its length changes with the season and location.
Why does another calendar show a different time?
Printed almanacs may use a standard city, rounded sunrise times, or a different horizon or almanac convention. Compare the assumptions before relying on an exact minute.
Do the times use my phone's time zone?
No. All dates and displayed times explicitly use Asia/Colombo (Sri Lanka time), even when you travel.
Do you need access to my location?
No. Choose a listed city. No GPS permission or external astronomy service is used.
Check the stated data sources and assumptions before relying on a result.