Schaumburg, Illinois, United States keeps America/Chicago time. Every Vedic daily timing here, the Panchang, Rahu Kaal, Choghadiya and Muhurat, is built from Schaumburg's own sunrise and sunset, not a single all-India (IST) table, so it is specific to Schaumburg and shifts a little each day. Schaumburg runs 10 hours 30 minutes behind India, so a timing copied from an Indian panchang is wrong here. The live panel on each page is recalculated daily for Schaumburg.
The live panel shows today's tithi, nakshatra, yoga, karana and vaara for Schaumburg, updated daily.
The Panchang depends on local sunrise, and Schaumburg's sunrise differs, so its tithi/nakshatra timings are specific to Schaumburg.
Astronomically precise Rahu Kaal timings for 25 major Indian cities.