IST to CRT Time Converter

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

Mumbai · India Standard Time
22:23:56
Tuesday, May 12, 2026
GMT+5:30 · UTC+05:30
San José · Costa Rica Time
10:53:56
Tuesday, May 12, 2026
CST · UTC-06:00

Convert a specific time

From: IST (Mumbai)
To: CRT (San José)
--:--

Daylight Saving status right now

IST (India Standard Time)
Observes DST
No
CRT (Costa Rica Time)
Observes DST
No

When can IST and CRT 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
CRT
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 CRT.
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 CRT conversion table

IST time (Mumbai)CRT time (San José)Status
00:00 Tue12:30 MonCRT working
01:00 Tue13:30 MonCRT working
02:00 Tue14:30 MonCRT working
03:00 Tue15:30 MonCRT working
04:00 Tue16:30 MonCRT working
05:00 Tue17:30 MonOff-hours both sides
06:00 Tue18:30 MonOff-hours both sides
07:00 Tue19:30 MonOff-hours both sides
08:00 Tue20:30 MonOff-hours both sides
09:00 Tue21:30 MonIST working
10:00 Tue22:30 MonIST working
11:00 Tue23:30 MonIST working
12:00 Tue00:30 TueIST working
13:00 Tue01:30 TueIST working
14:00 Tue02:30 TueIST working
15:00 Tue03:30 TueIST working
16:00 Tue04:30 TueIST working
17:00 Tue05:30 TueOff-hours both sides
18:00 Tue06:30 TueOff-hours both sides
19:00 Tue07:30 TueOff-hours both sides
20:00 Tue08:30 TueOff-hours both sides
21:00 Tue09:30 TueCRT working
22:00 Tue10:30 TueCRT working
23:00 Tue11:30 TueCRT 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
Costa Rica Time (CRT)
IANA identifier
America/Costa_Rica
Current UTC offset
UTC-06:00
Current abbreviation
CST
Major cities in this zone
San José

Sun today in Mumbai and San José

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

Related converters

CRT to IST (reverse)IST to ESTIST to PSTIST to GMTIST to UTCIST to CETEST to CRTPST to CRTGMT to CRTUTC to CRTCET to CRT
Looking for local time? See time in Mumbai or time in San José.

Frequently asked questions

What is the time difference between IST and CRT right now?+
CRT (Costa Rica 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 CRT observe daylight saving time?+
IST: does not observe daylight saving time. CRT: does not observe daylight saving time.
When is the best time to schedule a meeting between IST and CRT?+
IST and CRT 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 San José when it is 12:00 noon in Mumbai?+
When it is 12:00 Tue in Mumbai (IST), it is 00:30 Tue in San José (CRT).
Which IANA time zone identifiers are used for IST and CRT?+
IST maps to "Asia/Kolkata" in the IANA database. CRT maps to "America/Costa_Rica". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Mumbai ahead of or behind San José?+
Whether Mumbai (IST) is ahead of or behind San José (CRT) depends on the current UTC offsets. Right now CRT 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 CRT?+
IST is UTC+05:30 (GMT+5:30) and CRT is UTC-06:00 (CST). 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 CRT?+
No standard business-hours overlap exists between IST and CRT. Plan asynchronous work or schedule outside 9-5 on at least one side.