IST to MST Time Converter

Convert India Standard Time (IST) to Mountain Standard Time (MST). Both time zones are shown live below; current offset between them is 11h 30m behind.

Mumbai · India Standard Time
06:26:55
Monday, May 11, 2026
GMT+5:30 · UTC+05:30
Denver · Mountain Standard Time
18:56:55
Sunday, May 10, 2026
MDT · UTC-06:00

Convert a specific time

From: IST (Mumbai)
To: MST (Denver)
--:--

Daylight Saving status right now

IST (India Standard Time)
Observes DST
No
MST (Mountain Standard Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-11-01
Offset shift
UTC-06:00 → UTC-07:00

Heads up: MST observes DST while IST does not. The 11.5-hour difference shown above will shift by one hour when MST starts or ends DST.

When can IST and MST meet?

00
01
02
03
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06
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09
10
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19
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IST
MST
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.
No business-hours overlap exists between IST and MST.
The two zones are too far apart for synchronous meetings during normal working hours. Plan async or schedule outside 9-5 on at least one side.

Hour-by-hour IST to MST conversion table

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

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
Mountain Standard Time (MST)
IANA identifier
America/Denver
Current UTC offset
UTC-06:00
Current abbreviation
MDT
Major cities in this zone
DenverPhoenixSalt Lake CityAlbuquerque

Sun today in Mumbai and Denver

Mumbai
Sunrise
06:06
Sunset
19:05
Solar noon
12:36
Daylight
12h 58m
Denver
Sunrise
05:51
Sunset
20:03
Solar noon
12:57
Daylight
14h 12m

Related converters

MST to IST (reverse)IST to ESTIST to PSTIST to GMTIST to UTCIST to CETEST to MSTPST to MSTGMT to MSTUTC to MSTCET to MST
Looking for local time? See time in Mumbai or time in Denver.

Frequently asked questions

What is the time difference between IST and MST right now?+
MST (Mountain Standard Time) is currently 11h 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 MST observe daylight saving time?+
IST: does not observe daylight saving time. MST: observes daylight saving time.
When is the best time to schedule a meeting between IST and MST?+
IST and MST have no business-hour overlap, even at the edges of a typical workday. Async collaboration or non-9-5 scheduling is the practical choice.
What time is it in Denver when it is 12:00 noon in Mumbai?+
When it is 12:00 Mon in Mumbai (IST), it is 00:30 Mon in Denver (MST).
Which IANA time zone identifiers are used for IST and MST?+
IST maps to "Asia/Kolkata" in the IANA database. MST maps to "America/Denver". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Mumbai ahead of or behind Denver?+
Whether Mumbai (IST) is ahead of or behind Denver (MST) depends on the current UTC offsets. Right now MST is 11h 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 MST?+
IST is UTC+05:30 (GMT+5:30) and MST is UTC-06:00 (MDT). 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 MST?+
No standard business-hours overlap exists between IST and MST. Plan asynchronous work or schedule outside 9-5 on at least one side.