Colombo, Sri Lanka keeps Asia/Colombo time. Every Vedic daily timing here, the Panchang, Rahu Kaal, Choghadiya and Muhurat, is built from Colombo's own sunrise and sunset, not a single all-India (IST) table, so it is specific to Colombo and shifts a little each day. Timings in Colombo follow its own local sunrise, not an Indian (IST) table. The live panel on each page is recalculated daily for Colombo.
The live panel shows today's tithi, nakshatra, yoga, karana and vaara for Colombo, updated daily.
The Panchang depends on local sunrise, and Colombo's sunrise differs, so its tithi/nakshatra timings are specific to Colombo.
Astronomically precise Rahu Kaal timings for 25 major Indian cities.