IST to CHST Time Converter

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

Mumbai · India Standard Time
10:22:35
Saturday, May 23, 2026
GMT+5:30 · UTC+05:30
Hagåtña · Chamorro Standard Time
14:52:35
Saturday, May 23, 2026
GMT+10 · UTC+10:00

Convert a specific time

From: IST (Mumbai)
To: CHST (Hagåtña)
--:--

Daylight Saving status right now

IST (India Standard Time)
Observes DST
No
CHST (Chamorro Standard Time)
Observes DST
No

When can IST and CHST meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
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19
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23
IST
CHST
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.
4 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 09:00–12:00 IST (13:30–16:30 CHST).

Hour-by-hour IST to CHST conversion table

IST time (Mumbai)CHST time (Hagåtña)Status
00:00 Sat04:30 SatOff-hours both sides
01:00 Sat05:30 SatOff-hours both sides
02:00 Sat06:30 SatOff-hours both sides
03:00 Sat07:30 SatOff-hours both sides
04:00 Sat08:30 SatOff-hours both sides
05:00 Sat09:30 SatCHST working
06:00 Sat10:30 SatCHST working
07:00 Sat11:30 SatCHST working
08:00 Sat12:30 SatCHST working
09:00 Sat13:30 SatBoth at work
10:00 Sat14:30 SatBoth at work
11:00 Sat15:30 SatBoth at work
12:00 Sat16:30 SatBoth at work
13:00 Sat17:30 SatIST working
14:00 Sat18:30 SatIST working
15:00 Sat19:30 SatIST working
16:00 Sat20:30 SatIST working
17:00 Sat21:30 SatOff-hours both sides
18:00 Sat22:30 SatOff-hours both sides
19:00 Sat23:30 SatOff-hours both sides
20:00 Sat00:30 SunOff-hours both sides
21:00 Sat01:30 SunOff-hours both sides
22:00 Sat02:30 SunOff-hours both sides
23:00 Sat03:30 SunOff-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
Chamorro Standard Time (CHST)
IANA identifier
Pacific/Guam
Current UTC offset
UTC+10:00
Current abbreviation
GMT+10
Major cities in this zone
Hagåtña

Sun today in Mumbai and Hagåtña

Mumbai
Sunrise
06:03
Sunset
19:10
Solar noon
12:36
Daylight
13h 7m

Related converters

CHST to IST (reverse)IST to ESTIST to PSTIST to GMTIST to UTCIST to CETEST to CHSTPST to CHSTGMT to CHSTUTC to CHSTCET to CHST
Looking for local time? See time in Mumbai or time in Hagåtña.

Frequently asked questions

What is the time difference between IST and CHST right now?+
CHST (Chamorro Standard Time) is currently 4h 30m ahead 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 CHST observe daylight saving time?+
IST: does not observe daylight saving time. CHST: does not observe daylight saving time.
When is the best time to schedule a meeting between IST and CHST?+
The strongest overlap is 09:00–12:00 IST (13:30–16:30 CHST), giving 4 hours when both sides are within standard 9am-5pm working hours.
What time is it in Hagåtña when it is 12:00 noon in Mumbai?+
When it is 12:00 Sat in Mumbai (IST), it is 16:30 Sat in Hagåtña (CHST).
Which IANA time zone identifiers are used for IST and CHST?+
IST maps to "Asia/Kolkata" in the IANA database. CHST maps to "Pacific/Guam". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Mumbai ahead of or behind Hagåtña?+
Whether Mumbai (IST) is ahead of or behind Hagåtña (CHST) depends on the current UTC offsets. Right now CHST is 4h 30m ahead IST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for IST and CHST?+
IST is UTC+05:30 (GMT+5:30) and CHST is UTC+10:00 (GMT+10). 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 CHST?+
Yes. There are 4 hours of overlap during standard 9am-5pm working hours, with the strongest window at 09:00–12:00 IST.