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