IST to IDT Converter
Convert time between India Standard Time (IST) and Israel Daylight Time (IDT)
India Standard Time (IST)
Israel Daylight Time (IDT)
Time Difference
Israel Daylight Time (IDT) is 0 hours ahead of India Standard Time (IST)
Select Date
Select Time
Quick Reference
| IST | IDT |
|---|---|
| 07:30 | 05:00 |
| 09:30 | 07:00 |
| 11:30 | 09:00 |
| 13:30 | 11:00 |
| 15:30 | 13:00 |
| 17:30 | 15:00 |
| 19:30 | 17:00 |
| 21:30 | 19:00 |
| 23:30 | 21:00 |
| 01:30 | 23:00 |
| 03:30 | 01:00 |
| 05:30 | 03:00 |
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 IST to IDT Time Conversion
Converting time between India Standard Time (IST) and Israel Daylight Time (IDT) helps coordinate work between Mumbai, Delhi, Bangalore, and Israeli cities like Tel Aviv and Jerusalem. IST is UTC+5:30 while IDT is UTC+3, making IST 2 hours and 30 minutes ahead of IDT — an unusual half-hour offset that requires careful attention when scheduling.
This time zone converter uses the IANA timezone database to ensure accurate calculations. India does not observe daylight saving, so IST is constant year-round. Israel uses IDT from late March to late October. Whether you are scheduling business calls between Bangalore and Tel Aviv or coordinating with family, this converter delivers reliable results.
Common Use Cases for IST to IDT Conversion
Business & Work
- Scheduling meetings between India-based teams and Israeli partners
- Coordinating project deadlines across India and Israel
- Planning conference calls between Bangalore and Tel Aviv
Personal & Travel
- Planning travel itineraries between India and Israel
- Coordinating with family and friends in Israel from India
- Scheduling virtual events for IST and IDT audiences
Time Zone Information
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
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)
Quick Reference: IST to IDT
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 IST and IDT?
India Standard Time (IST) is UTC+5:30, while Israel Daylight Time (IDT) is UTC+3. IST is 2 hours and 30 minutes ahead of IDT. When it is 12:00 PM in Mumbai, it is 9:30 AM in Tel Aviv.
When does this IST to IDT 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 India and Israel grows to 3 hours and 30 minutes.
What are the best times for IST-IDT business calls?
A 12:00 PM call in Mumbai is 9:30 AM in Tel Aviv — a midday slot for IST and a fresh morning for IDT. The full Indian business day overlaps neatly with the Israeli morning and early afternoon.
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 (which shares the IST abbreviation but a different meaning from India Standard Time).
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.
Pro Tips
- • IST is 2.5 hours ahead of IDT — drop 2.5 hours from a Mumbai time to get the Tel Aviv time.
- • India never observes DST, so the offset shifts only when Israel transitions between IDT and IST (Israel Standard Time).
- • Best meeting window: 11:00 AM–2:00 PM India time = 8:30–11:30 AM Israel time — comfortable for both regions.
- • 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.