Ram Navami Date Calculator | Chaitra Navami by Year

Formula: Tithi = ⌊(Moon−Sun elongation) ÷ 12°⌋; Nakshatra = ⌊Moon longitude ÷ 13°20'⌋; Vimshottari lord sequence Ketu→Venus→Sun→Moon→Mars→Rahu→Jupiter→Saturn→Mercury

How the Ram Navami date is found

The festival is Chaitra Shukla Navami — the 9th tithi of the bright fortnight of the lunar month Chaitra. The calculator scans the year's panchang data for the span when the Moon–Sun elongation lies in the Navami band (96°–108°) during Chaitra, then assigns the festival to the civil date on which Navami is present at sunrise — the rule most North Indian panchangs use.

Madhyahna, the midday celebration window, is the middle fifth of local daylight: the sunrise-to-sunset span is divided into five parts and the central part, centred on local solar noon, is reported. Because solar noon shifts about 4 minutes per degree of longitude, the window runs earlier on the clock in eastern cities (Kolkata) than in western ones (Mumbai).

Conventions vary: some traditions celebrate when Navami prevails at midday even if the sunrise tithi was Ashtami, which can shift the observed date by a day in some regions. The calculator follows the sunrise-tithi convention and notes where the alternative reckoning differs.