Yes. The tool detects DST automatically for every conversion. When either the source or target zone is on DST, a yellow warning banner appears to make it clear. The offset shown reflects the actual DST-adjusted offset for that specific date, not the standard offset.

A UTC offset (e.g. UTC+5:30) is the fixed number of hours and minutes a timezone is ahead of or behind UTC. An abbreviation (e.g. IST, EST, PDT) is a short name for a timezone, which can change when DST kicks in. IST stays IST year-round, but US Eastern switches between EST (UTC-5) in winter and EDT (UTC-4) in summer.

Yes. Use the date-time picker to enter any date in the past or future. The DST detection is date-aware, so the result accounts for whether DST was or will be in effect on that specific date.

Select “New York (EST/EDT)” as the source timezone and “Mumbai / Delhi (IST)” as the target. Enter the time you want to convert, and the IST equivalent appears instantly. IST is UTC+5:30, EST is UTC-5, so the difference is 10 hours 30 minutes (or 9h 30m when New York is on EDT).

It reverses the source and target zones in one click. Useful when you receive a meeting invite in another timezone and want to know what that time is in your local zone, then quickly check the reverse for a reply.