ALT to CST Time Converter

Convert Algeria Time (ALT) to Central Standard Time (CST). Both time zones are shown live below; current offset between them is 6 hours behind.

Algiers · Algeria Time
21:03:23
Tuesday, May 12, 2026
GMT+1 · UTC+01:00
Chicago · Central Standard Time
15:03:23
Tuesday, May 12, 2026
CDT · UTC-05:00

Convert a specific time

From: ALT (Algiers)
To: CST (Chicago)
--:--

Daylight Saving status right now

ALT (Algeria Time)
Observes DST
No
CST (Central Standard Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-11-01
Offset shift
UTC-05:00 → UTC-06:00

Heads up: CST observes DST while ALT does not. The 6-hour difference shown above will shift by one hour when CST starts or ends DST.

When can ALT and CST meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
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21
22
23
ALT
CST
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.
2 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 15:00–16:00 ALT (09:00–10:00 CST).

Hour-by-hour ALT to CST conversion table

ALT time (Algiers)CST time (Chicago)Status
00:00 Tue18:00 MonOff-hours both sides
01:00 Tue19:00 MonOff-hours both sides
02:00 Tue20:00 MonOff-hours both sides
03:00 Tue21:00 MonOff-hours both sides
04:00 Tue22:00 MonOff-hours both sides
05:00 Tue23:00 MonOff-hours both sides
06:00 Tue00:00 TueOff-hours both sides
07:00 Tue01:00 TueOff-hours both sides
08:00 Tue02:00 TueOff-hours both sides
09:00 Tue03:00 TueALT working
10:00 Tue04:00 TueALT working
11:00 Tue05:00 TueALT working
12:00 Tue06:00 TueALT working
13:00 Tue07:00 TueALT working
14:00 Tue08:00 TueALT working
15:00 Tue09:00 TueBoth at work
16:00 Tue10:00 TueBoth at work
17:00 Tue11:00 TueCST working
18:00 Tue12:00 TueCST working
19:00 Tue13:00 TueCST working
20:00 Tue14:00 TueCST working
21:00 Tue15:00 TueCST working
22:00 Tue16:00 TueCST working
23:00 Tue17:00 TueOff-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
Central Standard Time (CST)
IANA identifier
America/Chicago
Current UTC offset
UTC-05:00
Current abbreviation
CDT
Major cities in this zone
ChicagoHoustonDallasAustinNew Orleans

Sun today in Algiers and Chicago

Chicago
Sunrise
05:34
Sunset
20:01
Solar noon
12:48
Daylight
14h 26m

Related converters

CST to ALT (reverse)ALT to ESTALT to PSTALT to GMTALT to UTCALT to CETEST to CSTPST to CSTGMT to CSTUTC to CSTCET to CST
Looking for local time? See time in Algiers or time in Chicago.

Frequently asked questions

What is the time difference between ALT and CST right now?+
CST (Central Standard Time) is currently 6 hours behind ALT (Algeria Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does ALT or CST observe daylight saving time?+
ALT: does not observe daylight saving time. CST: observes daylight saving time.
When is the best time to schedule a meeting between ALT and CST?+
The strongest overlap is 15:00–16:00 ALT (09:00–10:00 CST), giving 2 hours when both sides are within standard 9am-5pm working hours.
What time is it in Chicago when it is 12:00 noon in Algiers?+
When it is 12:00 Tue in Algiers (ALT), it is 06:00 Tue in Chicago (CST).
Which IANA time zone identifiers are used for ALT and CST?+
ALT maps to "Africa/Algiers" in the IANA database. CST maps to "America/Chicago". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Algiers ahead of or behind Chicago?+
Whether Algiers (ALT) is ahead of or behind Chicago (CST) depends on the current UTC offsets. Right now CST is 6 hours behind ALT. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for ALT and CST?+
ALT is UTC+01:00 (GMT+1) and CST is UTC-05:00 (CDT). 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 CST?+
Yes. There are 2 hours of overlap during standard 9am-5pm working hours, with the strongest window at 15:00–16:00 ALT.