Convert Iran Standard Time to Central Standard Time
Instantly convert Iran Standard Time (IRST) to Central Standard Time (CST) with our free online calculator.
Iran Standard Time
08:50:59 AM
Wed, Jun 24 (IRST)
Central Standard Time
11:20:59 PM
Tue, Jun 23 (CST)
Convert a Specific Time
24-Hour Comparison
| IRST | CST |
|---|---|
| 12:00 AM | 2.5:00 PM(-1d) |
| 1:00 AM | 3.5:00 PM(-1d) |
| 2:00 AM | 4.5:00 PM(-1d) |
| 3:00 AM | 5.5:00 PM(-1d) |
| 4:00 AM | 6.5:00 PM(-1d) |
| 5:00 AM | 7.5:00 PM(-1d) |
| 6:00 AM | 8.5:00 PM(-1d) |
| 7:00 AM | 9.5:00 PM(-1d) |
| 8:00 AM | 10.5:00 PM(-1d) |
| 9:00 AM | 11.5:00 PM(-1d) |
| 10:00 AM | 0.5:00 AM |
| 11:00 AM | 1.5:00 AM |
| 12:00 PM | 2.5:00 AM |
| 1:00 PM | 3.5:00 AM |
| 2:00 PM | 4.5:00 AM |
| 3:00 PM | 5.5:00 AM |
| 4:00 PM | 6.5:00 AM |
| 5:00 PM | 7.5:00 AM |
| 6:00 PM | 8.5:00 AM |
| 7:00 PM | 9.5:00 AM |
| 8:00 PM | 10.5:00 AM |
| 9:00 PM | 11.5:00 AM |
| 10:00 PM | 0.5:00 PM |
| 11:00 PM | 1.5:00 PM |
How to Convert Iran Standard Time to Central Standard Time
Formula
To convert Iran Standard Time (IRST) to Central Standard Time (CST): Convert IRST to CST
About Iran Standard Time (IRST)
Iran Standard Time (IRST, IANA: Asia/Tehran) is the civil time of the Islamic Republic of Iran, set at UTC+3:30 — one of the world's few 30-minute-offset time zones. IRST observes Daylight Saving Time (switching to IRDT = UTC+4:30) from the last Wednesday of the Iranian month of Farvardin (~March 22) to the last Wednesday of Shahrivar (~September 22) per Iranian government calendar (the country abolished DST in 2022 then partially reinstated it for energy savings — the schedule is subject to change by Iranian Parliament Majlis decree). The 30-minute offset is preserved because Iran's central meridian is approximately 52.5°E, between UTC+3 and UTC+4 standard zones, and the Iranian Solar Hijri calendar has its own astronomical traditions for time-keeping. IRST serves approximately 88 million Iranian people across 31 provinces. Major cities: Tehran (8.7M city, 13M metro — capital), Mashhad (3.1M), Isfahan (2.2M), Karaj (1.6M), Shiraz (1.6M), Tabriz (1.6M), Qom (1.2M). Other 30/45-minute offset zones: India (UTC+5:30), Nepal (UTC+5:45), Myanmar (UTC+6:30), Newfoundland (UTC-3:30), Afghanistan (UTC+4:30), Marquesas (UTC-9:30). Affects: Tehran Stock Exchange (TSE) trading, Iranian Solar Hijri New Year Nowruz celebrations.
About Central Standard Time (CST)
Central Standard Time (CST, IANA: America/Chicago, America/Mexico_City) is the time zone for the US Central region, central Mexico, and most of Central America, set at UTC-6:00. CST is the most populous US time zone by area covered and serves the Chicago-Dallas-Houston-Minneapolis corridor of ~80 million people across CST states (Texas, Illinois, Wisconsin, Minnesota, Iowa, Missouri, Arkansas, Louisiana, Mississippi, Alabama, Tennessee western, Kansas eastern, Nebraska eastern, Oklahoma, North Dakota, South Dakota, Kentucky western, Indiana western, Michigan UP, Florida panhandle) plus Mexico (Mexico City, Guadalajara, Monterrey since 2022 DST abolition), Honduras, Nicaragua, El Salvador, Costa Rica, Guatemala, Belize. CST observes DST (switching to CDT = UTC-5:00) per Energy Policy Act 2005 — except for Mexico nationally, which abolished DST in 2022 except for border zones aligning with US DST. CST affects: NYSE close at 15:00 CST, CME (Chicago Mercantile Exchange) commodity futures pit/electronic hours, Texas Medical Center coordinated patient handoffs.