CKT to IST Time Converter

Convert Cook Islands Time (CKT) to India Standard Time (IST). Both time zones are shown live below; current offset between them is 15h 30m ahead.

Rarotonga · Cook Islands Time
12:36:03
Wednesday, May 13, 2026
GMT-10 · UTC-10:00
Mumbai · India Standard Time
04:06:03
Thursday, May 14, 2026
GMT+5:30 · UTC+05:30

Convert a specific time

From: CKT (Rarotonga)
To: IST (Mumbai)
--:--

Daylight Saving status right now

CKT (Cook Islands Time)
Observes DST
No
IST (India Standard Time)
Observes DST
No

When can CKT 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
CKT
IST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Rarotonga (CKT). Each row shows the local working-hours state in that zone for the same moment in time.
No overlap during strict 9-5 working hours; some flexibility needed.
If both sides are willing to extend to 8am-7pm, the available window is 17:00–18:00 CKT (08:30–09:30 IST).

Hour-by-hour CKT to IST conversion table

CKT time (Rarotonga)IST time (Mumbai)Status
00:00 Wed15:30 WedIST working
01:00 Wed16:30 WedIST working
02:00 Wed17:30 WedOff-hours both sides
03:00 Wed18:30 WedOff-hours both sides
04:00 Wed19:30 WedOff-hours both sides
05:00 Wed20:30 WedOff-hours both sides
06:00 Wed21:30 WedOff-hours both sides
07:00 Wed22:30 WedOff-hours both sides
08:00 Wed23:30 WedOff-hours both sides
09:00 Wed00:30 ThuCKT working
10:00 Wed01:30 ThuCKT working
11:00 Wed02:30 ThuCKT working
12:00 Wed03:30 ThuCKT working
13:00 Wed04:30 ThuCKT working
14:00 Wed05:30 ThuCKT working
15:00 Wed06:30 ThuCKT working
16:00 Wed07:30 ThuCKT working
17:00 Wed08:30 ThuOff-hours both sides
18:00 Wed09:30 ThuIST working
19:00 Wed10:30 ThuIST working
20:00 Wed11:30 ThuIST working
21:00 Wed12:30 ThuIST working
22:00 Wed13:30 ThuIST working
23:00 Wed14:30 ThuIST 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

Cook Islands Time (CKT)
IANA identifier
Pacific/Rarotonga
Current UTC offset
UTC-10:00
Current abbreviation
GMT-10
Major cities in this zone
Rarotonga
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 Rarotonga and Mumbai

Mumbai
Sunrise
06:05
Sunset
19:06
Solar noon
12:36
Daylight
13h 0m

Related converters

IST to CKT (reverse)CKT to ESTCKT to PSTCKT to GMTCKT to UTCCKT to CETEST to ISTPST to ISTGMT to ISTUTC to ISTCET to IST
Looking for local time? See time in Rarotonga or time in Mumbai.

Frequently asked questions

What is the time difference between CKT and IST right now?+
IST (India Standard Time) is currently 15h 30m ahead CKT (Cook Islands Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does CKT or IST observe daylight saving time?+
CKT: does not observe daylight saving time. IST: does not observe daylight saving time.
When is the best time to schedule a meeting between CKT and IST?+
Standard 9-5 hours do not overlap. Extending to 8am-7pm gives a window of 17:00–18:00 CKT (08:30–09:30 IST).
What time is it in Mumbai when it is 12:00 noon in Rarotonga?+
When it is 12:00 Wed in Rarotonga (CKT), it is 03:30 Thu in Mumbai (IST).
Which IANA time zone identifiers are used for CKT and IST?+
CKT maps to "Pacific/Rarotonga" 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 Rarotonga ahead of or behind Mumbai?+
Whether Rarotonga (CKT) is ahead of or behind Mumbai (IST) depends on the current UTC offsets. Right now IST is 15h 30m ahead CKT. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for CKT and IST?+
CKT is UTC-10:00 (GMT-10) 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 CKT and IST?+
Not during a strict 9am-5pm window. If both sides flex to 8am-7pm, the available meeting window between CKT and IST is 17:00–18:00 CKT.