Z to IST Time Converter

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

UTC · Zulu Time
19:57:40
Monday, May 11, 2026
UTC · UTC+00:00
Mumbai · India Standard Time
01:27:40
Tuesday, May 12, 2026
GMT+5:30 · UTC+05:30

Convert a specific time

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

Daylight Saving status right now

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

When can Z and IST 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
Z
IST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in UTC (Z). Each row shows the local working-hours state in that zone for the same moment in time.
3 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 09:00–11:00 Z (14:30–16:30 IST).

Hour-by-hour Z to IST conversion table

Z time (UTC)IST time (Mumbai)Status
00:00 Mon05:30 MonOff-hours both sides
01:00 Mon06:30 MonOff-hours both sides
02:00 Mon07:30 MonOff-hours both sides
03:00 Mon08:30 MonOff-hours both sides
04:00 Mon09:30 MonIST working
05:00 Mon10:30 MonIST working
06:00 Mon11:30 MonIST working
07:00 Mon12:30 MonIST working
08:00 Mon13:30 MonIST working
09:00 Mon14:30 MonBoth at work
10:00 Mon15:30 MonBoth at work
11:00 Mon16:30 MonBoth at work
12:00 Mon17:30 MonZ working
13:00 Mon18:30 MonZ working
14:00 Mon19:30 MonZ working
15:00 Mon20:30 MonZ working
16:00 Mon21:30 MonZ working
17:00 Mon22:30 MonOff-hours both sides
18:00 Mon23:30 MonOff-hours both sides
19:00 Mon00:30 TueOff-hours both sides
20:00 Mon01:30 TueOff-hours both sides
21:00 Mon02:30 TueOff-hours both sides
22:00 Mon03:30 TueOff-hours both sides
23:00 Mon04:30 TueOff-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

Zulu Time (Z)
IANA identifier
UTC
Current UTC offset
UTC+00:00
Current abbreviation
UTC
Major cities in this zone
UTC
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 UTC and Mumbai

Mumbai
Sunrise
06:06
Sunset
19:05
Solar noon
12:36
Daylight
12h 59m

Related converters

IST to Z (reverse)Z to ESTZ to PSTZ to GMTZ to UTCZ to CETEST to ISTPST to ISTGMT to ISTUTC to ISTCET to IST
Looking for local time? See time in UTC or time in Mumbai.

Frequently asked questions

What is the time difference between Z and IST right now?+
IST (India Standard Time) is currently 5h 30m ahead Z (Zulu Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does Z or IST observe daylight saving time?+
Z: does not observe daylight saving time. IST: does not observe daylight saving time.
When is the best time to schedule a meeting between Z and IST?+
The strongest overlap is 09:00–11:00 Z (14:30–16:30 IST), giving 3 hours when both sides are within standard 9am-5pm working hours.
What time is it in Mumbai when it is 12:00 noon in UTC?+
When it is 12:00 Mon in UTC (Z), it is 17:30 Mon in Mumbai (IST).
Which IANA time zone identifiers are used for Z and IST?+
Z maps to "UTC" in the IANA database. IST maps to "Asia/Kolkata". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is UTC ahead of or behind Mumbai?+
Whether UTC (Z) is ahead of or behind Mumbai (IST) depends on the current UTC offsets. Right now IST is 5h 30m ahead Z. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for Z and IST?+
Z is UTC+00:00 (UTC) and IST is UTC+05:30 (GMT+5:30). 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 Z and IST?+
Yes. There are 3 hours of overlap during standard 9am-5pm working hours, with the strongest window at 09:00–11:00 Z.