How do I convert IST to Z?

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

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

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

IST to Z Time Converter

Convert India Standard Time (IST) to Zulu Time (Z). Both time zones are shown live below; current offset between them is 5h 30m behind.

Mumbai · India Standard Time

20:11:19

Wednesday, May 6, 2026

GMT+5:30 · UTC+05:30

UTC · Zulu Time

14:41:19

Wednesday, May 6, 2026

UTC · UTC+00:00

Convert a specific time

From: IST (Mumbai)

To: Z (UTC)

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Daylight Saving status right now

IST (India Standard Time)

Observes DST: No

Z (Zulu Time)

Observes DST: No

When can IST and Z meet?

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

Best meeting window: 15:00–16:00 IST (09:30–10:30 Z).

Hour-by-hour IST to Z conversion table

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

Zulu Time (Z)

IANA identifier: UTC
Current UTC offset: UTC+00:00
Current abbreviation: UTC

Major cities in this zone

UTC

Sun today in Mumbai and UTC

Mumbai

Sunrise

06:09

Sunset

19:03

Solar noon

12:36

Daylight

12h 54m

Related converters

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

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

Frequently asked questions

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

Z (Zulu Time) is currently 5h 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 Z observe daylight saving time?+

IST: does not observe daylight saving time. Z: does not observe daylight saving time.

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

The strongest overlap is 15:00–16:00 IST (09:30–10:30 Z), giving 2 hours when both sides are within standard 9am-5pm working hours.

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

When it is 12:00 Wed in Mumbai (IST), it is 06:30 Wed in UTC (Z).

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

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