How do I convert IST to SLST?

To convert IST to SLST, use our free time converter tool. Enter the time in India Standard Time and instantly see the equivalent time in Sri Lanka Standard Time. The converter automatically accounts for Daylight Saving Time.

What time is it in Colombo when it's noon in Mumbai?

When it's 12:00 PM (noon) in Mumbai (IST), the time in Colombo (SLST) depends on the current UTC offset of both zones. Use our converter to get the exact current conversion.

IST to SLST Time Converter

Convert India Standard Time (IST) to Sri Lanka Standard Time (SLST). Both time zones are shown live below; current offset between them is same time.

Mumbai · India Standard Time

13:58:47

Wednesday, May 6, 2026

GMT+5:30 · UTC+05:30

Colombo · Sri Lanka Standard Time

13:58:47

Wednesday, May 6, 2026

GMT+5:30 · UTC+05:30

Convert a specific time

From: IST (Mumbai)

To: SLST (Colombo)

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Daylight Saving status right now

IST (India Standard Time)

Observes DST: No

SLST (Sri Lanka Standard Time)

Observes DST: No

When can IST and SLST meet?

8 hours of overlap during standard 9am-5pm working hours.

Best meeting window: 09:00–16:00 IST (09:00–16:00 SLST).

Hour-by-hour IST to SLST conversion table

IST time (Mumbai)	SLST time (Colombo)	Status
00:00 Wed	00:00 Wed	Off-hours both sides
01:00 Wed	01:00 Wed	Off-hours both sides
02:00 Wed	02:00 Wed	Off-hours both sides
03:00 Wed	03:00 Wed	Off-hours both sides
04:00 Wed	04:00 Wed	Off-hours both sides
05:00 Wed	05:00 Wed	Off-hours both sides
06:00 Wed	06:00 Wed	Off-hours both sides
07:00 Wed	07:00 Wed	Off-hours both sides
08:00 Wed	08:00 Wed	Off-hours both sides
09:00 Wed	09:00 Wed	Both at work
10:00 Wed	10:00 Wed	Both at work
11:00 Wed	11:00 Wed	Both at work
12:00 Wed	12:00 Wed	Both at work
13:00 Wed	13:00 Wed	Both at work
14:00 Wed	14:00 Wed	Both at work
15:00 Wed	15:00 Wed	Both at work
16:00 Wed	16:00 Wed	Both at work
17:00 Wed	17:00 Wed	Off-hours both sides
18:00 Wed	18:00 Wed	Off-hours both sides
19:00 Wed	19:00 Wed	Off-hours both sides
20:00 Wed	20:00 Wed	Off-hours both sides
21:00 Wed	21:00 Wed	Off-hours both sides
22:00 Wed	22:00 Wed	Off-hours both sides
23:00 Wed	23:00 Wed	Off-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

Sri Lanka Standard Time (SLST)

IANA identifier: Asia/Colombo
Current UTC offset: UTC+05:30
Current abbreviation: GMT+5:30

Major cities in this zone

Colombo

Sun today in Mumbai and Colombo

Mumbai

Sunrise

06:09

Sunset

19:03

Solar noon

12:36

Daylight

12h 54m

Related converters

SLST to IST (reverse)IST to EST IST to PST IST to GMT IST to UTC IST to CET EST to SLST PST to SLST GMT to SLST UTC to SLST CET to SLST

Looking for local time? See time in Mumbai or time in Colombo.

Frequently asked questions

What is the time difference between IST and SLST right now?+

SLST (Sri Lanka Standard Time) is currently same time 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 SLST observe daylight saving time?+

IST: does not observe daylight saving time. SLST: does not observe daylight saving time.

When is the best time to schedule a meeting between IST and SLST?+

The strongest overlap is 09:00–16:00 IST (09:00–16:00 SLST), giving 8 hours when both sides are within standard 9am-5pm working hours.

What time is it in Colombo when it is 12:00 noon in Mumbai?+

When it is 12:00 Wed in Mumbai (IST), it is 12:00 Wed in Colombo (SLST).

Which IANA time zone identifiers are used for IST and SLST?+

IST maps to "Asia/Kolkata" in the IANA database. SLST maps to "Asia/Colombo". These identifiers are what most software libraries use to convert times accurately, including DST handling.