IST
India Standard Time
India, Sri Lanka
Now in Kolkata:
IST — India Standard Time
Quick facts
- Abbreviation
- IST
- Full name
- India Standard Time
- UTC offset
- UTC+5:30
- Type
- Standard time
- Used in
- India, Sri Lanka
- Example zone
- Asia/Kolkata
Cities that use IST
About IST
IST is the abbreviation for India Standard Time, a time zone offset of UTC+5:30. It applies in India, Sri Lanka.
Ambiguous: "IST" also means Irish Standard Time (UTC+1) and Israel Standard Time (UTC+2). India's IST is offset by an unusual half hour, UTC+5:30.
Time-zone abbreviations are convenient but not unique or official — several codes are shared by more than one zone. When precision matters, use the underlying IANA zone name (for example Asia/Kolkata) or the UTC offset UTC+5:30 instead.
Frequently asked questions
- What does IST stand for?
- IST stands for India Standard Time. It is UTC+5:30, used in India, Sri Lanka. Ambiguous: "IST" also means Irish Standard Time (UTC+1) and Israel Standard Time (UTC+2). India's IST is offset by an unusual half hour, UTC+5:30.
- What is the UTC offset of IST?
- IST (India Standard Time) is UTC+5:30, meaning it is 5.5 hours ahead of Coordinated Universal Time.
- Does IST change for daylight saving time?
- Regions on IST generally keep this offset year-round rather than switching for daylight saving.
See also: all time zone abbreviations