Why does India use UTC+5:30 instead of a whole-hour offset?

IST (UTC+5:30) was established in 1947 as a compromise between the eastern and western geographic extents of India. A UTC+5 offset would be too early for eastern India; UTC+6 too late for the west. The half-hour split has been maintained ever since.

2026 年 3 月更新

Current Time in India

Q: What time is it in India right now?

India spans 1 timezone: IST. Use the live clocks on this page for the exact local time in each major city.

Q: How many timezones does India have?

India uses 1 timezone: IST. Not all regions observe daylight saving time on the same schedule.

Q: When is the best time to call someone in India?

Aim for 9:00 AM to 5:00 PM local time in the specific city you are calling. Because India spans 1 timezone, the right call window depends on the city, not just the country. Use the Best Time to Call calculator for an exact overlap window.

Live clocks for every India city — UTC offsets, DST status, and inter-city time gaps.

, India

--:--:--

読み込み中…

IST 夏時間なし

詳細

この国のタイムゾーン構造

India's single UTC+5:30 zone — anchoring 1.4 billion people

India runs on a single timezone (IST, UTC+5:30) across the entire country — one of only a handful of nations covering a large east-west span with just one offset. The 30-minute increment is unusual: it exists because Indian Standard Time was set at the 82.5°E meridian in 1906, splitting the difference between Kolkata (east) and Mumbai (west). India does not observe DST. Business hours run 9:30 AM - 6:30 PM IST typically, with IT / BPO shifts extending later to overlap US working hours.

地域的背景

南アジア各地のタイムゾーン

South Asia (India, Pakistan, Bangladesh, Sri Lanka, Nepal, Bhutan) runs on a small set of tightly-clustered timezones — most of the region is between UTC+5 and UTC+6, with India's IST (UTC+5:30) being the reference clock. None of the major economies observe DST, so offsets stay fixed year-round. The overlap window with both Europe and the US East Coast is compressed but usable — why so many global support / BPO operations base delivery here.

India Cities by Timezone

1 timezone · 3 cities · live times

IST

3 cities

--:--:--

都市が異なる夏時間スケジュールを採用している場合、時差は季節によって変化する可能性があります。

よくある質問

Timezones, DST rules, and scheduling in India

What time is it in India right now?

India spans 1 timezone — IST — so there is no single answer. The live clocks above show the exact time in , , .

How many timezones does India have?

India uses a single timezone: IST. The whole country follows the same clock year-round.

インドは夏時間を遵守していますか?

No. India does not observe daylight saving time. Indian Standard Time (IST, UTC+5:30) is fixed year-round across all 28 states and 8 union territories — clocks never change. This makes India uniquely consistent for international scheduling.

When is the best time to call someone in India?

Aim for 9:00 AM – 5:00 PM local time in the specific city. Because India spans 1 timezones, the overlap window from your location differs between cities. Open any city page above for its full scheduling guide.