IST Time Now
Indian Standard Time (IST)
UTC+5:30 · No Daylight Saving Time
IST Timezone Details
| Abbreviation | IST |
| Full name | Indian Standard Time |
| UTC Offset | UTC+5:30 |
| Daylight Saving Time | No |
| IANA Timezone ID | Asia/Kolkata |
| Countries / Regions | India, Sri Lanka |
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| UTC | --:--:-- |
| London (GMT/BST) | --:--:-- |
| New York (EST/EDT) | --:--:-- |
| Dubai (GST) | --:--:-- |
| Tokyo (JST) | --:--:-- |
| Sydney (AEST) | --:--:-- |
| Beijing (CST) | --:--:-- |
About IST — Indian Standard Time
Indian Standard Time (IST) is the timezone used throughout India and Sri Lanka, at UTC+5:30 (5 hours and 30 minutes ahead of Coordinated Universal Time). India uses a single timezone for the entire country, making IST the official time for all of India's 1.4 billion people—the world's largest population served by one timezone.
IST does not observe Daylight Saving Time (DST). The time in India stays constant throughout the year. This means IST is always UTC+5:30, regardless of the season. This makes IST one of the most stable and predictable timezones globally.
The unusual half-hour offset (UTC+5:30 instead of a whole-number offset) dates back to 1905, when the Indian government chose Allahabad (82.5°E longitude) as the reference meridian—exactly half-way between UTC+5 and UTC+6.
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