Central time meets India time
India is 11 hours 30 minutes ahead of Central time in January and 10 hours 30 minutes ahead in July. A 9:00 AM start in Chicago is 8:30 PM in India in January and 7:30 PM in July. Enter a time or press Use now and the India time follows.
The extra hour of gap in winter comes from the US side. Central moves to CDT in spring and back to CST in autumn, while India does not move. A call booked at a fixed Central time will therefore land an hour earlier on the India clock in summer than in winter.
For a Texas or Midwest company with an engineering team in India, the day handover works in one direction. A Central 8:00 PM message arrives at 7:30 AM in India the next morning in January, in time for the start of the Indian workday, so a handoff at the end of the Central day gives the Indian team a full day. Meanwhile, a 1:00 PM Central call in January is 12:30 AM in India. The hour-by-hour table lays out a 9:00 to 17:00 Central day on the India clock.
The date flag is worth reading, since several results here fall on the next calendar day for India. Press swap if you want to start from the India time and read Central.
Worked examples
Questions about this tool
How far ahead of Central time is India?
11.5 hours in winter and 10.5 hours in summer. India stays on UTC+5:30 all year.
Why is the answer in half hours?
India's offset from UTC includes a half hour, so a Central time on the hour becomes a time at :30 in India.
Is 9:00 AM Central a reasonable time for an India call?
It is evening in India, 7:30 PM in summer and 8:30 PM in winter, which is late but possible for a short call.
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Where this comes from: IANA time zone database and the rules behind it ยท RFC 6557, how the time zone database is maintained