Time Zone Converter

A time zone converter translates a date and time from one location to another, accounting for each location's UTC offset and daylight saving rules. This calculator uses IANA time zone identifiers (for example America/New_York, Asia/Kolkata) and date-aware calculations, so results correctly reflect daylight saving time rather than a fixed offset.

It depends on whether Eastern Time is in EST or EDT on that date. During EST (UTC-5, roughly November–March), 9 AM Eastern is 7:30 PM IST the same day. During EDT (UTC-4, roughly March–November), 9 AM Eastern is 6:30 PM IST the same day. Select the actual date in the calculator above for an exact answer.

DST is a seasonal clock change — used in parts of North America, Europe, and Australia/New Zealand — that shifts a location's UTC offset for part of the year. Because the same city can be at two different offsets depending on the date, a time zone conversion is only accurate if it accounts for whether DST is in effect on the date you actually care about. DST start/end dates are set by individual governments and can change.

No. India Standard Time (UTC+5:30) is fixed year-round. However, when converting IST to a location that does observe DST (such as the US or UK), the time difference between IST and that location still changes across the year, because the other city's offset is shifting even though India's is not.

Conversions are computed from the IANA Time Zone Database — the same timezone data used by Linux, macOS, iOS, Android, and most programming languages — via the Luxon library, which reads that data at calculation time rather than relying on a hardcoded offset table. This makes results accurate for current and near-future dates, but it does not model time zones from before roughly 1970 and can only reflect a legislative DST change once the underlying tzdata is updated.