IDT to IST Converter
Convert time between Israel Daylight Time (IDT) and India Standard Time (IST)
Israel Daylight Time (IDT)
India Standard Time (IST)
Time Difference
India Standard Time (IST) is 0 hours ahead of Israel Daylight Time (IDT)
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Select Time
Quick Reference
| IDT | IST |
|---|---|
| 05:00 | 07:30 |
| 07:00 | 09:30 |
| 09:00 | 11:30 |
| 11:00 | 13:30 |
| 13:00 | 15:30 |
| 15:00 | 17:30 |
| 17:00 | 19:30 |
| 19:00 | 21:30 |
| 21:00 | 23:30 |
| 23:00 | 01:30 |
| 01:00 | 03:30 |
| 03:00 | 05:30 |
Top 10 Most Common Time Zones
| Abbreviation | Full Name | UTC Offset | Typical Use |
|---|---|---|---|
| UTC | Coordinated Universal Time | UTC ±0 | Global reference standard (servers, logs, APIs) |
| EST / EDT | Eastern (US) Time | UTC −5 / −4 | New York, Toronto — North American business hub |
| CST / CDT | Central (US) Time | UTC −6 / −5 | Chicago, Dallas — US central business region |
| PST / PDT | Pacific (US) Time | UTC −8 / −7 | San Francisco, Los Angeles — tech industry standard |
| GMT / BST | Greenwich Mean / British Summer Time | UTC 0 / +1 | UK, used globally as a reference with UTC |
| CET / CEST | Central European (Summer) Time | UTC +1 / +2 | Paris, Berlin, Amsterdam — EU business core |
| IST | India Standard Time | UTC +5:30 | India — major IT & outsourcing region |
| CST | China Standard Time | UTC +8 | Beijing, Shanghai — East Asia business hub |
| JST | Japan Standard Time | UTC +9 | Tokyo — finance & tech hub |
| AEST / AEDT | Australian Eastern (Daylight) Time | UTC +10 / +11 | Sydney, Melbourne — APAC regional business |
Why Time Zone Abbreviations Are Ambiguous
Unlike standardized identifiers (like America/New_York or Europe/London from the IANA tz database), abbreviations such as "CST" or "IST" are not globally unique. They can refer to different time zones depending on context — country, region, or even time of year (due to daylight saving time).
Common Ambiguous Time Zone Abbreviations
| Abbrev. | Common Meaning(s) | UTC Offset | Region(s) |
|---|---|---|---|
| CST | Central Standard Time / China Standard Time / Cuba Standard Time | UTC−6 / UTC+8 / UTC−5 | North America, China, Cuba |
| IST | Indian Standard Time / Irish Standard Time / Israel Standard Time | UTC+5:30 / UTC+1 / UTC+2 | India, Ireland, Israel |
| AST | Atlantic Standard Time / Arabia Standard Time | UTC−4 / UTC+3 | Caribbean, Canada, Middle East |
| PST | Pacific Standard Time / Philippine Standard Time | UTC−8 / UTC+8 | North America, Philippines |
| EST | Eastern Standard Time (North America / Australia) | UTC−5 / UTC+10 | North America, Australia |
✅ Best Practice
To avoid ambiguity, always:
- Use IANA tz identifiers — e.g.,
America/New_Yorkinstead of "EST" - Specify UTC offset explicitly — e.g.,
UTC−5when abbreviations must be used - Include the full timezone name — e.g., "Eastern Standard Time (EST)" with UTC offset
About IDT to IST Time Conversion
Converting time between Israel Daylight Time (IDT) and India Standard Time (IST) helps coordinate work between Tel Aviv, Jerusalem, and Indian cities like Mumbai, Delhi, and Bangalore. IDT is UTC+3 while IST (India) is UTC+5:30, placing IST 2 hours and 30 minutes ahead of IDT — an unusual half-hour offset that requires careful attention when scheduling.
Note: in this project, IST refers to India Standard Time. Israel's own non-daylight-saving variant is also abbreviated IST in some sources, but here it is treated separately as Israel Standard Time. This converter uses the IANA Asia/Kolkata zone for the destination. India does not observe daylight saving, so IST is constant year-round. Israel uses IDT from late March to late October.
Common Use Cases for IDT to IST Conversion
Business & Work
- Scheduling meetings between Israeli teams and India-based partners
- Coordinating project deadlines across Israel and India
- Planning conference calls between Tel Aviv and Bangalore
Personal & Travel
- Planning travel itineraries between Israel and India
- Coordinating with family and friends in India from Israel
- Scheduling virtual events for IDT and IST audiences
Time Zone Information
Israel Daylight Time (IDT)
- UTC Offset: UTC+3 (UTC+2 during Israel Standard Time)
- IANA Timezone: Asia/Jerusalem
- Daylight Saving: Friday before last Sunday in March to last Sunday in October
- Major Cities: Tel Aviv, Jerusalem, Haifa, Eilat, Beersheba
- Coverage: All of Israel during daylight saving period (late March to late October)
India Standard Time (IST)
- UTC Offset: UTC+5:30
- IANA Timezone: Asia/Kolkata
- Daylight Saving: None - IST is constant year-round
- Major Cities: Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad, Pune
- Coverage: All of India and Sri Lanka
Quick Reference: IDT to IST
Remember: IST is always 2 hours 30 minutes ahead of IDT during Israel's daylight saving period
Frequently Asked Questions
What is the time difference between IDT and IST?
Israel Daylight Time (IDT) is UTC+3, while India Standard Time (IST) is UTC+5:30. IST is 2 hours and 30 minutes ahead of IDT. When it is 12:00 PM in Tel Aviv, it is 2:30 PM in Mumbai.
When does this IDT to IST conversion apply?
IST is constant year-round (India does not observe DST). IDT applies in Israel from late March to late October — so the 2.5-hour offset applies during that window. Outside it, when Israel uses Israel Standard Time (UTC+2), the offset becomes 3.5 hours.
How does the time difference change throughout the year?
IST never changes. The only shift comes from Israel: when Israel transitions to its winter standard time in late October, the offset between Israel and India grows to 3 hours and 30 minutes.
What are the best times for IDT-IST business calls?
A 9:00 AM call in Tel Aviv is 11:30 AM in Mumbai — a strong morning slot for IDT and a midday slot for IST. The full Israeli morning and early afternoon overlaps neatly with the Indian business day.
Which countries/regions use IST timezone?
India Standard Time (IST) is observed across all of India and Sri Lanka. Major cities include Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad, and Pune. India does not observe daylight saving time.
Which countries/regions use IDT timezone?
IDT is observed throughout Israel, including Tel Aviv, Jerusalem, Haifa, Eilat, and Beersheba. It is the daylight saving variant of Israel Standard Time (sometimes also abbreviated IST in other sources).
Pro Tips
- • IST is 2.5 hours ahead of IDT — add 2.5 hours to a Tel Aviv time to get the Mumbai time.
- • India never observes DST, so the offset shifts only when Israel transitions between IDT and Israel Standard Time.
- • Best meeting window: 8:30–11:30 AM IDT overlaps with 11:00 AM–2:00 PM IST.
- • When Israel switches to its winter standard time in late October, the offset becomes 3.5 hours.
- • Plan around Israel's Friday-Saturday weekend — Sunday is a working day in Israel.
- • Note: IST in Israel refers to Israel Standard Time, not India — be careful not to confuse the abbreviations.