CVP's True Rāhu Kālam Calculator Copyright CV Prakash

Optional: manual sunrise/sunset override (HH:MM)
If provided, these values override astronomical computation.
Weekday → Rāhu segment (counted from sunrise)
Mon=2, Tue=7, Wed=5, Thu=6, Fri=4, Sat=3, Sun=8
Fixed myth slots (assumes 06:00–18:00): Mon 07:30–09:00, Tue 15:00–16:30, Wed 12:00–13:30, Thu 13:30–15:00, Fri 10:30–12:00, Sat 09:00–10:30, Sun 16:30–18:00.
References: Āryabhaṭīya (Gola), Sūrya Siddhānta XIV (hora-vibhāga), Varāhamihira (Bṛhat Saṁhitā), IERS leap seconds, NASA/JPL ephemerides. This page corrects the method, not the faith.