IST to CST
US Central Time is 11½ hours behind India in winter and 10½ hours behind in summer: 7:30 PM in Hyderabad is 8:00 AM in Dallas or Chicago from November to March and 9:00 AM from March to November. India keeps the same clock all year; only Texas and Illinois change.
Convert the other way: CST → IST
India and the Texas–Illinois corridor
The Dallas–Fort Worth suburbs of Irving, Plano and Frisco, Houston's Sugar Land and Chicago's suburbs are major centers for Indian-American professionals, and many banks, insurers and energy companies in those cities work with delivery teams in India. Here CST means US Central Time, not China Standard Time, which is two and a half hours ahead of India.
The workable overlap is the Indian evening and the Central morning. In winter, 7:30–9:30 PM IST is 8:00–10:00 AM Central; in summer the same Central hours fall at 6:30–8:30 PM IST, a little friendlier for India. Teams that schedule by the Indian clock will see their Central-time meetings move an hour after each US clock change.
Meeting times that work on both sides
There is no shared office hour. The least painful options:
- 8:00 AM IST9:30 PM CSTearly for IST
- 6:00 PM IST7:30 AM CSTlate for IST
End-of-day handoffs
When the Indian team closes at 6:30 PM IST, it is 7:00 AM in Dallas in winter or 8:00 AM in summer, so a handoff note written at the end of the Indian day is ready as the Central-zone team logs on. Questions sent from Texas after lunch, around 1:00 PM Central, reach India at 12:30 or 11:30 PM and are answered the next morning, which still gives Texas the answer before its own day starts.
For the same calculation from the American side, with call and travel examples, see CST to IST.
What time is it in CST when it is … in IST?
Every hour of the day, using today's offsets (daylight saving is applied automatically).
Night (0–5)
- 12:00 AM
- 1:30 PM−1
- 1:00 AM
- 2:30 PM−1
- 2:00 AM
- 3:30 PM−1
- 3:00 AM
- 4:30 PM−1
- 4:00 AM
- 5:30 PM−1
- 5:00 AM
- 6:30 PM−1
Morning (6–11)
- 6:00 AM
- 7:30 PM−1
- 7:00 AM
- 8:30 PM−1
- 8:00 AM
- 9:30 PM−1
- 9:00 AM
- 10:30 PM−1
- 10:00 AM
- 11:30 PM−1
- 11:00 AM
- 12:30 AM
Afternoon (12–17)
- 12:00 PM
- 1:30 AM
- 1:00 PM
- 2:30 AM
- 2:00 PM
- 3:30 AM
- 3:00 PM
- 4:30 AM
- 4:00 PM
- 5:30 AM
- 5:00 PM
- 6:30 AM
Evening (18–23)
- 6:00 PM
- 7:30 AM
- 7:00 PM
- 8:30 AM
- 8:00 PM
- 9:30 AM
- 9:00 PM
- 10:30 AM
- 10:00 PM
- 11:30 AM
- 11:00 PM
- 12:30 PM
Daylight saving time
- India Standard TimeIST
No daylight saving; all year UTC+5:30
India
- Central TimeCST / CDT
UTC−6 in winter, UTC−5 in summer
US Central states
Cities on these zones
Other conversions with these zones
Frequently asked questions
- What time is 7:30 PM IST in Dallas?
- 8:00 AM Central in winter and 9:00 AM Central in summer, on the same date.
- Is CST here China Standard Time?
- No. On this page CST is US Central Time (UTC−6 in winter, UTC−5 in summer). China Standard Time is UTC+8, 2½ hours ahead of India.
- How many hours behind India is Houston in summer?
- 10½ hours. Houston uses Central Daylight Time from the second Sunday of March to the first Sunday of November.
- When should an Indian team send end-of-day updates to Chicago?
- Anytime before about 7:00 PM IST lands before the Chicago working day begins, all year.
- Does Texas use one time zone?
- Almost. Most of Texas is Central Time; El Paso and Hudspeth County in the far west use Mountain Time, 12½ or 11½ hours behind India.