Time Zone Converter

World time zones at a glance

Working with global teams means constantly converting times. This converter shows 12 major time zones simultaneously — so you can schedule that standup knowing everyone's local time without mental arithmetic.

Key time zone offsets from UTC

IST (India) — UTC+5:30
GST (Dubai/UAE) — UTC+4
SGT (Singapore) — UTC+8
JST (Tokyo) — UTC+9
AEST (Sydney) — UTC+10/+11 (DST)
CET (Paris/Berlin) — UTC+1/+2 (DST)
GMT (London) — UTC+0/+1 (DST)
EST (New York) — UTC−5/−4 (DST)
PST (Los Angeles) — UTC−8/−7 (DST)

Tips for global scheduling

For recurring meetings across IST and US timezones, 8–9 PM IST maps to 7:30–8:30 AM EST and 4:30–5:30 AM PST — a common overlap window. IST to UK overlap is easiest 1:30–4:30 PM IST (8–11 AM GMT in winter).

Common use cases for time zone conversion

Indian IT professionals working with US clients routinely convert between IST and EST/PST for stand-up calls, sprint reviews, and on-call schedules. Remote-first teams use it to find the least-painful meeting window across APAC, India, Europe, and the Americas. Travel planners convert departure and arrival times across time zones when booking international flights. Traders working with NSE/BSE and NYSE/NASDAQ monitor overlap windows between Indian market hours (9:15 AM – 3:30 PM IST) and US pre-market hours.

Understanding Daylight Saving Time

India does not observe Daylight Saving Time — IST is always UTC+5:30. Most Western countries do observe DST, which shifts clocks forward by one hour in spring and back in autumn. This means the IST-to-EST offset changes between 10.5 hours (winter, EST = UTC−5) and 9.5 hours (summer, EDT = UTC−4). This converter automatically applies the correct DST offset for the date you enter, so you always see the accurate local time.

How this converter handles half-hour and quarter-hour offsets

Not all time zones are whole-hour offsets from UTC. India is UTC+5:30 (half-hour). Nepal is UTC+5:45 (quarter-hour). Iran is UTC+3:30. Australia's Northern Territory is UTC+9:30. This converter uses the IANA Time Zone Database via the browser's Intl.DateTimeFormat API, which correctly handles all offset variants and historical DST transitions.

Frequently asked questions

What is the difference between IST and UTC?

IST (Indian Standard Time) is UTC+5:30 — five and a half hours ahead of Coordinated Universal Time. India uses a single time zone for the entire country despite its geographic spread.

What time is 9 AM IST in New York?

9:00 AM IST is 10:30 PM EST (previous day) in New York during standard time, or 11:30 PM EDT during daylight saving time. Use this converter to get the exact current conversion accounting for DST.

Does this handle Daylight Saving Time (DST)?

Yes. The converter uses the browser's Intl.DateTimeFormat API, which automatically applies Daylight Saving Time rules for each timezone based on the selected date. India does not observe DST.

What is UTC vs GMT?

UTC (Coordinated Universal Time) and GMT (Greenwich Mean Time) are numerically the same for most purposes. GMT is a timezone used by the UK in winter; UTC is the universal time standard that all other timezones are defined relative to.

Can I convert a future or past date/time?

Yes. Enter any date and time in the date and time fields, select the source timezone, and the converter shows the equivalent time in all 12 featured time zones.