IST — India Standard Time
See what IST means, where it is used, how it relates to DST, and convert IST to other time zones worldwide.
Meaning and Where Used
IST commonly means India Standard Time, which is UTC+5:30 and used across India with no daylight saving time. The abbreviation IST also appears in Ireland and Israel in different seasonal contexts.
DST and Counterpart Rules
India Standard Time does not observe DST, so its offset stays fixed all year. In regions that switch seasonally, IST may be paired with IDT, and this page helps clarify the difference.
Convert IST to Others
Compare IST with other time zones using the hour-by-hour conversion grid and scheduling table. Export meetings with ICS download or send to Google Calendar and Gmail.
How to Convert IST to Other Time Zones
Open the IST converter page: Go to https://www.xconvert.com/time-converter/ist-time-zone to load the comparison grid with IST already shown on the timeline. This is useful when you need to line up working hours for teams in Mumbai, Delhi, Bengaluru, Kolkata, Chennai, Jerusalem, Tel Aviv, West Jerusalem, Haifa, or Ashdod, especially for support coverage, client calls, or cross-border project handoffs.
Add comparison cities: Click + Add City and search for cities you want to compare against IST, then add them as new rows in the grid. A practical setup is to add Mumbai for India operations, Tel Aviv or Jerusalem for Israel-based teams, and Delhi or Bengaluru for internal coordination across major business centers that use IST.
Select a meeting window on the grid: Click Select to enter selection mode, then drag across the colored timeline on the IST row to highlight a time range in purple. You can drag the center of the selection to move it or use the left and right handles to resize it, which helps when you are testing whether a work-hour block in India Standard Time (UTC+5) also fits teams in other IST cities such as Tel Aviv or Jerusalem.
Export and share the result: Once a time range is selected, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. This is the fastest way to send a confirmed meeting slot to distributed teams working across India, Ireland, and Israel, so each participant can open the same shared time window in their preferred calendar workflow.
About India Standard Time (IST)
IST stands for India Standard Time. Its exact offset is UTC+5, which means it is five hours ahead of Coordinated Universal Time for the standard-time abbreviation shown on this page.
IST is used in India, Ireland, and Israel. Major cities associated with IST include Jerusalem, Tel Aviv, West Jerusalem, Haifa, Ashdod, Mumbai, Delhi, Bengaluru, Kolkata, and Chennai, making it relevant for business scheduling across technology, finance, logistics, government, and customer support operations.
IST is a standard-time abbreviation, and its daylight saving counterpart is IDT. That distinction matters when comparing schedules across countries that may use the same abbreviation label in different contexts, because the standard-time version and the daylight-time version are not the same thing.
IST and Daylight Saving Time
IST on this page is the standard-time abbreviation, and its counterpart during daylight saving time is IDT. When a region switches away from standard time, the abbreviation changes from IST to IDT, so calendar coordination should always confirm which abbreviation appears for the selected date.
The exact current-year switch dates are not fixed here in a way that should be assumed across every location that uses IST. Because India, Ireland, and Israel are all associated with IST in different contexts, the most reliable way to see whether your selected date falls under IST or IDT is to use the date picker on the converter page and review the timeline for that specific day.
This matters in real scheduling situations. A recurring call that looks correct under IST (UTC+5) on one date may display differently on another date if the location is observing the daylight saving counterpart IDT, so teams handling weekly client meetings or regional operations should confirm the abbreviation before sending invites.
Frequently Asked Questions
What does IST stand for?
IST stands for India Standard Time. On this page, IST refers to the standard-time abbreviation with an exact offset of UTC+5, which is the base reference users need when comparing schedules against other time zones.
Is IST the same as IDT?
No, IST and IDT are not the same abbreviation. IST is the standard-time abbreviation, while IDT is its daylight saving counterpart, so they can represent different clock settings depending on the date and location.
Which cities use IST?
Cities associated with IST include Jerusalem, Tel Aviv, West Jerusalem, Haifa, Ashdod, Mumbai, Delhi, Bengaluru, Kolkata, and Chennai. These cities make IST especially relevant for users coordinating work across Indian business hubs and Israeli metropolitan areas.
What is the UTC offset for IST?
The UTC offset for IST is UTC+5. In practical terms, that means IST is five hours ahead of UTC when the standard-time abbreviation applies, which is the key reference point for converting calls, deadlines, and calendar events.
Which countries use IST?
IST is used in India, Ireland, and Israel. That country overlap is one reason IST can create confusion in international scheduling, so it helps to compare the actual city row in the converter rather than relying only on the abbreviation.
When does IST change?
IST changes when a location moves from the standard-time abbreviation to its daylight saving counterpart, IDT. Because the applicable date can vary by location and calendar day, the safest approach is to select your meeting date in the converter and confirm whether the page shows IST or IDT for that specific schedule.
Why is IST confusing in international scheduling?
IST can be confusing because the abbreviation is associated with India, Ireland, and Israel, while the standard-time and daylight-time forms are not identical. If you are booking a call involving cities such as Mumbai and Tel Aviv, it is better to compare the city rows directly in the grid so you can see the actual overlap on the selected date.
How do I schedule a meeting using IST on the converter?
Open the IST page, add the cities you need with + Add City, and use Select to drag a purple meeting range across the timeline. After adjusting the range with the handles or by dragging the center, export it through ICS, Google Calendar, Gmail, Copy to clipboard, or Share link so everyone receives the same confirmed time window.