Frequently Asked Questions
Answers to common questions about dates, cities, Amanta and Purnimanta months, ayanamsha and saving events.
- Why does a date differ from another panchang?
- Most differences come from the city, the sunrise definition (upper limb or centre, refraction, elevation), the month system (Amanta or Purnimanta) or the ayanamsha. Janma uses astronomy-engine positions and shows the rule it applied on each festival page.
- How do I change the city or date?
- Use the city box and the date bar at the top of any page. Your city is remembered on this device.
- What are Amanta and Purnimanta?
- Two ways of naming lunar months. Amanta months end at the new moon and are common in the south and west; Purnimanta months end at the full moon and are common in the north. Festival days are the same; only the month name of the dark fortnight changes.
- Which ayanamsha does Janma use?
- Lahiri by default. Birth forms and Match let you choose Lahiri, Raman, KP or True Chitra for each person.
- What is the Surya Siddhanta option?
- An approximate model of the classical mean-motion arithmetic for the Sun and Moon, offered for comparison in Settings. It is labelled approximate; sunrise and the planets stay astronomical.
- Can I add festivals to my calendar?
- Yes. The Month Panchang page has an Add to Google Calendar link for each event, an ICS download, and a form to add your own events, which stay in this browser.
Snapshot computed for Mumbai on 18 October 2026. The live page recalculates for your city and date.
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