How AstroG calculates your Pooja time abroad
Why Panchanga and Viratham timings change outside India, and how AstroG calculates them for your city.
Why your timings change outside India
Every Panchanga timing starts from the sky above you. Sunrise, sunset, moonrise and the local clock time of each tithi and nakshatra depend on where you are. When you live in Houston, London, Toronto or Sydney, the same Ekadashi, Pradosham or Pournami happens at the same moment in the sky, but that moment falls at a different local clock time — and sometimes on a different calendar date — than in Chennai or Hyderabad.
What AstroG calculates for your city
AstroG uses your selected location (latitude, longitude and time zone, including daylight-saving rules) to calculate:
local sunrise and sunset — the Panchanga day runs from sunrise to the next sunrise, not from midnight;
Rahu Kalam, Yamagandam, Gulikai, Abhijit and Durmuhurtham from your local day length;
hora sequence from your local sunrise;
moonrise for observances completed after seeing the Moon (Sankatahara Chaturthi, Pournami);
the Pradosha window around your local sunset;
the Ekadashi Parana window on the next morning.
One event, local presentation
AstroG keeps one astronomical event — for example, the end of Ekadashi tithi — and shows it in your time zone. The event is never duplicated; only its local presentation changes. Your birth chart is not affected: it always uses your birth place.
How to observe abroad
Follow the date and times shown for your city, not an Indian clock time.
Use your local sunrise to begin a fast and your local moonrise or sunset where the observance depends on them.
If an ingredient such as bilva, durva or tulasi is not available, tradition values sincere devotion; offer a fresh leaf or flower.
Many temples abroad hold group poojas on major days; home worship during your local window is complete.
Checking the details
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AstroG editorial team.
Source: AstroG calculation method