ALT to IST Time Converter

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

Algiers · Algeria Time
20:15:43
Tuesday, May 12, 2026
GMT+1 · UTC+01:00
Mumbai · India Standard Time
00:45:43
Wednesday, May 13, 2026
GMT+5:30 · UTC+05:30

Convert a specific time

From: ALT (Algiers)
To: IST (Mumbai)
--:--

Daylight Saving status right now

ALT (Algeria Time)
Observes DST
No
IST (India Standard Time)
Observes DST
No

When can ALT 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
ALT
IST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Algiers (ALT). 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 ALT (13:30–16:30 IST).

Hour-by-hour ALT to IST conversion table

ALT time (Algiers)IST time (Mumbai)Status
00:00 Tue04:30 TueOff-hours both sides
01:00 Tue05:30 TueOff-hours both sides
02:00 Tue06:30 TueOff-hours both sides
03:00 Tue07:30 TueOff-hours both sides
04:00 Tue08:30 TueOff-hours both sides
05:00 Tue09:30 TueIST working
06:00 Tue10:30 TueIST working
07:00 Tue11:30 TueIST working
08:00 Tue12:30 TueIST working
09:00 Tue13:30 TueBoth at work
10:00 Tue14:30 TueBoth at work
11:00 Tue15:30 TueBoth at work
12:00 Tue16:30 TueBoth at work
13:00 Tue17:30 TueALT working
14:00 Tue18:30 TueALT working
15:00 Tue19:30 TueALT working
16:00 Tue20:30 TueALT working
17:00 Tue21:30 TueOff-hours both sides
18:00 Tue22:30 TueOff-hours both sides
19:00 Tue23:30 TueOff-hours both sides
20:00 Tue00:30 WedOff-hours both sides
21:00 Tue01:30 WedOff-hours both sides
22:00 Tue02:30 WedOff-hours both sides
23:00 Tue03:30 WedOff-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

Algeria Time (ALT)
IANA identifier
Africa/Algiers
Current UTC offset
UTC+01:00
Current abbreviation
GMT+1
Major cities in this zone
Algiers
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 Algiers and Mumbai

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

Related converters

IST to ALT (reverse)ALT to ESTALT to PSTALT to GMTALT to UTCALT to CETEST to ISTPST to ISTGMT to ISTUTC to ISTCET to IST
Looking for local time? See time in Algiers or time in Mumbai.

Frequently asked questions

What is the time difference between ALT and IST right now?+
IST (India Standard Time) is currently 4h 30m ahead ALT (Algeria Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does ALT or IST observe daylight saving time?+
ALT: does not observe daylight saving time. IST: does not observe daylight saving time.
When is the best time to schedule a meeting between ALT and IST?+
The strongest overlap is 09:00–12:00 ALT (13:30–16:30 IST), giving 4 hours when both sides are within standard 9am-5pm working hours.
What time is it in Mumbai when it is 12:00 noon in Algiers?+
When it is 12:00 Tue in Algiers (ALT), it is 16:30 Tue in Mumbai (IST).
Which IANA time zone identifiers are used for ALT and IST?+
ALT maps to "Africa/Algiers" 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 Algiers ahead of or behind Mumbai?+
Whether Algiers (ALT) is ahead of or behind Mumbai (IST) depends on the current UTC offsets. Right now IST is 4h 30m ahead ALT. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for ALT and IST?+
ALT is UTC+01:00 (GMT+1) 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 ALT and IST?+
Yes. There are 4 hours of overlap during standard 9am-5pm working hours, with the strongest window at 09:00–12:00 ALT.