IST to CKT Time Converter

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

Mumbai · India Standard Time
10:22:42
Saturday, May 23, 2026
GMT+5:30 · UTC+05:30
Rarotonga · Cook Islands Time
18:52:42
Friday, May 22, 2026
GMT-10 · UTC-10:00

Convert a specific time

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

Daylight Saving status right now

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

When can IST and CKT 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
CKT
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 overlap during strict 9-5 working hours; some flexibility needed.
If both sides are willing to extend to 8am-7pm, the available window is 08:00–10:00 IST (16:30–18:30 CKT).

Hour-by-hour IST to CKT conversion table

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

Sun today in Mumbai and Rarotonga

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

Related converters

CKT to IST (reverse)IST to ESTIST to PSTIST to GMTIST to UTCIST to CETEST to CKTPST to CKTGMT to CKTUTC to CKTCET to CKT
Looking for local time? See time in Mumbai or time in Rarotonga.

Frequently asked questions

What is the time difference between IST and CKT right now?+
CKT (Cook Islands Time) is currently 15h 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 CKT observe daylight saving time?+
IST: does not observe daylight saving time. CKT: does not observe daylight saving time.
When is the best time to schedule a meeting between IST and CKT?+
Standard 9-5 hours do not overlap. Extending to 8am-7pm gives a window of 08:00–10:00 IST (16:30–18:30 CKT).
What time is it in Rarotonga when it is 12:00 noon in Mumbai?+
When it is 12:00 Sat in Mumbai (IST), it is 20:30 Fri in Rarotonga (CKT).
Which IANA time zone identifiers are used for IST and CKT?+
IST maps to "Asia/Kolkata" in the IANA database. CKT maps to "Pacific/Rarotonga". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Mumbai ahead of or behind Rarotonga?+
Whether Mumbai (IST) is ahead of or behind Rarotonga (CKT) depends on the current UTC offsets. Right now CKT is 15h 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 CKT?+
IST is UTC+05:30 (GMT+5:30) and CKT 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 CKT?+
Not during a strict 9am-5pm window. If both sides flex to 8am-7pm, the available meeting window between IST and CKT is 08:00–10:00 IST.