How do I convert IST to IRST?

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

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

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

IST to IRST Time Converter

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

Mumbai · India Standard Time

08:53:33

Wednesday, May 6, 2026

GMT+5:30 · UTC+05:30

Dublin · Irish Standard Time

04:23:33

Wednesday, May 6, 2026

GMT+1 · UTC+01:00

Convert a specific time

From: IST (Mumbai)

To: IRST (Dublin)

--:--

Daylight Saving status right now

IST (India Standard Time)

Observes DST: No

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

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 IST and IRST meet?

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

Best meeting window: 14:00–16:00 IST (09:30–11:30 IRST).

Hour-by-hour IST to IRST conversion table

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

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

Irish Standard Time (IRST)

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

Major cities in this zone

Dublin

Sun today in Mumbai and Dublin

Mumbai

Sunrise

06:09

Sunset

19:03

Solar noon

12:36

Daylight

12h 54m

Related converters

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

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

Frequently asked questions

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

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

Does IST or IRST observe daylight saving time?+

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

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

The strongest overlap is 14:00–16:00 IST (09:30–11:30 IRST), giving 3 hours when both sides are within standard 9am-5pm working hours.

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

When it is 12:00 Wed in Mumbai (IST), it is 07:30 Wed in Dublin (IRST).

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

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