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
02:56:51
Wednesday, May 13, 2026
GMT+5:30 · UTC+05:30
UTC · Zulu Time
21:26:51
Tuesday, May 12, 2026
UTC · UTC+00:00

Convert a specific time

From: IST (Mumbai)
To: Z (UTC)
--:--

Daylight Saving status right now

IST (India Standard Time)
Observes DST
No
Z (Zulu Time)
Observes DST
No

When can IST and Z meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
IST
Z
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Mumbai (IST). Each row shows the local working-hours state in that zone for the same moment in time.
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 Wed18:30 TueOff-hours both sides
01:00 Wed19:30 TueOff-hours both sides
02:00 Wed20:30 TueOff-hours both sides
03:00 Wed21:30 TueOff-hours both sides
04:00 Wed22:30 TueOff-hours both sides
05:00 Wed23:30 TueOff-hours both sides
06:00 Wed00:30 WedOff-hours both sides
07:00 Wed01:30 WedOff-hours both sides
08:00 Wed02:30 WedOff-hours both sides
09:00 Wed03:30 WedIST working
10:00 Wed04:30 WedIST working
11:00 Wed05:30 WedIST working
12:00 Wed06:30 WedIST working
13:00 Wed07:30 WedIST working
14:00 Wed08:30 WedIST working
15:00 Wed09:30 WedBoth at work
16:00 Wed10:30 WedBoth at work
17:00 Wed11:30 WedZ working
18:00 Wed12:30 WedZ working
19:00 Wed13:30 WedZ working
20:00 Wed14:30 WedZ working
21:00 Wed15:30 WedZ working
22:00 Wed16:30 WedZ working
23:00 Wed17:30 WedOff-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
06:06
Sunset
19:06
Solar noon
12:36
Daylight
13h 0m

Related converters

Z to IST (reverse)IST to ESTIST to PSTIST to GMTIST to UTCIST to CETEST to ZPST to ZGMT to ZUTC to ZCET 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.
Is Mumbai ahead of or behind UTC?+
Whether Mumbai (IST) is ahead of or behind UTC (Z) depends on the current UTC offsets. Right now Z is 5h 30m behind IST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for IST and Z?+
IST is UTC+05:30 (GMT+5:30) and Z is UTC+00:00 (UTC). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both IST and Z?+
Yes. There are 2 hours of overlap during standard 9am-5pm working hours, with the strongest window at 15:00–16:00 IST.