If you downloaded a panchang app while still in India, or it just defaults to an Indian city, it is very likely showing you numbers computed for the wrong place once you move abroad.
The default is easy to miss
Most panchang apps assume IST and a default city (often Delhi, Mumbai or wherever the app’s servers are configured) unless you actively change the location setting. Many users never realize this setting exists, and keep seeing India-based panchang for years after relocating.
Why this actually matters
Tithi transitions, sunrise, sunset, Rahu Kaal and Abhijit Muhurat are all computed from a specific latitude, longitude and time zone. Reading India’s numbers while sitting in Chicago or London does not give you an approximation, it gives you data for a different point on Earth entirely, which can shift both the date and the exact time of a window.
A quick way to check
Open your panchang app’s location setting and confirm it is set to your actual current city, not a default or a city you set years ago. If the app only supports Indian cities, that is a sign to switch to one computed globally.
Get it computed for where you actually are
Use the panchang page and select your current city directly, wherever in the world that is.
For more tools built with the diaspora in mind, see the guide for Indians abroad.
This information is descriptive.