How do I convert IRST to IST?

To convert IRST to IST, use our free time converter tool. Enter the time in Irish Standard Time and instantly see the equivalent time in India Standard Time. The converter automatically accounts for Daylight Saving Time.

What time is it in Mumbai when it's noon in Dublin?

When it's 12:00 PM (noon) in Dublin (IRST), the time in Mumbai (IST) depends on the current UTC offset of both zones. Use our converter to get the exact current conversion.

IRST to IST Time Converter

Convert Irish Standard Time (IRST) to India Standard Time (IST). Both time zones are shown live below; current offset between them is 4h 30m ahead.

Dublin · Irish Standard Time

15:22:50

Wednesday, May 6, 2026

GMT+1 · UTC+01:00

Mumbai · India Standard Time

19:52:50

Wednesday, May 6, 2026

GMT+5:30 · UTC+05:30

Convert a specific time

From: IRST (Dublin)

To: IST (Mumbai)

--:--

Daylight Saving status right now

IRST (Irish Standard Time)

Observes DST: Yes
In DST right now: Yes
Next fall back: 2026-10-25
Offset shift: UTC+01:00 → UTC+00:00

IST (India Standard Time)

Observes DST: No

Heads up: IRST observes DST while IST does not. The 4.5-hour difference shown above will shift by one hour when IRST starts or ends DST.

When can IRST and IST meet?

4 hours of overlap during standard 9am-5pm working hours.

Best meeting window: 09:00–12:00 IRST (13:30–16:30 IST).

Hour-by-hour IRST to IST conversion table

IRST time (Dublin)	IST time (Mumbai)	Status
00:00 Wed	04:30 Wed	Off-hours both sides
01:00 Wed	05:30 Wed	Off-hours both sides
02:00 Wed	06:30 Wed	Off-hours both sides
03:00 Wed	07:30 Wed	Off-hours both sides
04:00 Wed	08:30 Wed	Off-hours both sides
05:00 Wed	09:30 Wed	IST working
06:00 Wed	10:30 Wed	IST working
07:00 Wed	11:30 Wed	IST working
08:00 Wed	12:30 Wed	IST working
09:00 Wed	13:30 Wed	Both at work
10:00 Wed	14:30 Wed	Both at work
11:00 Wed	15:30 Wed	Both at work
12:00 Wed	16:30 Wed	Both at work
13:00 Wed	17:30 Wed	IRST working
14:00 Wed	18:30 Wed	IRST working
15:00 Wed	19:30 Wed	IRST working
16:00 Wed	20:30 Wed	IRST working
17:00 Wed	21:30 Wed	Off-hours both sides
18:00 Wed	22:30 Wed	Off-hours both sides
19:00 Wed	23:30 Wed	Off-hours both sides
20:00 Wed	00:30 Thu	Off-hours both sides
21:00 Wed	01:30 Thu	Off-hours both sides
22:00 Wed	02:30 Thu	Off-hours both sides
23:00 Wed	03:30 Thu	Off-hours both sides

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Irish Standard Time (IRST)

IANA identifier: Europe/Dublin
Current UTC offset: UTC+01:00
Current abbreviation: GMT+1

Major cities in this zone

Dublin

India Standard Time (IST)

IANA identifier: Asia/Kolkata
Current UTC offset: UTC+05:30
Current abbreviation: GMT+5:30

Major cities in this zone

MumbaiNew DelhiBangaloreChennaiKolkata

Sun today in Dublin and Mumbai

Mumbai

Sunrise

06:09

Sunset

19:03

Solar noon

12:36

Daylight

12h 54m

Related converters

IST to IRST (reverse)IRST to EST IRST to PST IRST to GMT IRST to UTC IRST to CET EST to IST PST to IST GMT to IST UTC to IST CET to IST

Looking for local time? See time in Dublin or time in Mumbai.

Frequently asked questions

What is the time difference between IRST and IST right now?+

IST (India Standard Time) is currently 4h 30m ahead IRST (Irish Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.

Does IRST or IST observe daylight saving time?+

IRST: observes daylight saving time. IST: does not observe daylight saving time.

When is the best time to schedule a meeting between IRST and IST?+

The strongest overlap is 09:00–12:00 IRST (13:30–16:30 IST), giving 4 hours when both sides are within standard 9am-5pm working hours.

What time is it in Mumbai when it is 12:00 noon in Dublin?+

When it is 12:00 Wed in Dublin (IRST), it is 16:30 Wed in Mumbai (IST).

Which IANA time zone identifiers are used for IRST and IST?+

IRST maps to "Europe/Dublin" in the IANA database. IST maps to "Asia/Kolkata". These identifiers are what most software libraries use to convert times accurately, including DST handling.