IRDT Time to CST Time Converter

Warning! IRDT has automatically switched to IRST
CST has automatically switched to CDT

IRDT stands for Iran Daylight Time (NOT in use)

IRST stands for Iran Standard Time (in use)

CST stands for Central Standard Time (NOT in use)

CDT stands for Central Daylight Time (in use)

IRST = UTC + 03:30

16:28:34

Monday, October 20, 2025

CDT = UTC - 05:00

07:58:34

Monday, October 20, 2025

IRST(Iran Standard Time) and CDT(Central Daylight Time) Mapping Table
Iran Standard Time(IRST)	Central Daylight Time(CDT)
00:00	15:30-1 day
01:00	16:30-1 day
02:00	17:30-1 day
03:00	18:30-1 day
04:00	19:30-1 day
05:00	20:30-1 day
06:00	21:30-1 day
07:00	22:30-1 day
08:00	23:30-1 day
09:00	00:30
10:00	01:30
11:00	02:30
12:00	03:30
13:00	04:30
14:00	05:30
15:00	06:30
16:00	07:30
17:00	08:30
18:00	09:30
19:00	10:30
20:00	11:30
21:00	12:30
22:00	13:30
23:00	14:30

IRST(Iran Standard Time)

Iran Standard Time(IRST) is 03:30 hours ahead of Coordinated Universal(UTC) Time.This timezone is used during standard time in: AsiaIran Standard Time is a half-hour time zone. Its local time differs by 30 minutes instead of the normal whole hour.

Typical City of IRST (Iran Standard Time)

Iran - Tehran (Winter)

CDT(Central Daylight Time)

Central Daylight Time(CDT) is 05:00 hours behind Coordinated Universal(UTC) Time.This timezone is a Daylight Saving Time timezone and is used in: North America

Typical City of CDT (Central Daylight Time)

USA - Chicago (Summer)