Tehran
Iran Standard Time
--:--
Chicago
Central Standard Time
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The exact hour gap shifts with DST — dial it in below.
12PM IRST → CST · DST-aware · Shareable12PM IRST → CST · DST-aware
12PM IRST to CST
translated & shareable.
Iran Standard Time (Tehran) and Central Standard Time (Chicago). This page opens with 12PM IRST preset—shift the calendar, compare tables, and copy a link your team can reopen anytime.
1
Check live clocks
See current time in Tehran (IRST) and Chicago (CST) with active DST rules before you dial in the deadline date.
2
Set the deadline
The workspace opens with 12PM IRST preset—pick the actual calendar date, read day-shift warnings, and business-hours badges in Chicago.
3
Share or explore
Copy a shareable URL, scan the 24-hour table below, or jump to related deadline routes for the same zone pair.
Searching "12pm IRST to CST"? When a colleague says "12pm IRST" they mean 12pm in Iran Standard Time (Tehran). In Central Standard Time (Chicago) that's approximately 2:30 AM CST on the same day.
Tehran is currently 9.5 hours ahead of Chicago. Because Daylight Saving Time affects this pair, the exact converted time may shift by an hour during DST transition windows — the converter below accounts for the deadline date you choose. For other times between these zones see the 24-hour table further down, or jump to the full IRST → CST converter. Open the full IRST → CST converter.
Deadline workspace
Set the source, use the answer.
Live conversion
1
Source deadline
time and date the client gave you
2
Timezone route
Swap the direction any time if you are checking from your side.
Your local deadline
03:30
CDT · 2026-06-24 · Wed
Source
12:00
GMT+3:30
Countdown
Deadline passed
Planning status
Outside hours
Outside business hoursWed
Google CalendarHour-by-hour map
24-hour reference: IRST → CST
Every civil hour today from Tehran (IRST) translated into Chicago (CST). Compare any slot to your preset (12PM IRST); day badges mark midnight crossings and times follow your browser’s IANA database.
IRSTCST
Hourly wall-clock map for today — midnight crossings show as day shifts.
IRST with part-of-day icon
CST arrow and converted time
Day
- 00:0015:30Prev day
- 01:0016:30Prev day
- 02:0017:30Prev day
- 03:0018:30Prev day
- 04:0019:30Prev day
- 05:0020:30Prev day
- 06:0021:30Prev day
- 07:0022:30Prev day
- 08:0023:30Prev day
- 09:0000:30Same day
- 10:0001:30Same day
- 11:0002:30Same day
- 12:0003:30Same day
- 13:0004:30Same day
- 14:0005:30Same day
- 15:0006:30Same day
- 16:0007:30Same day
- 17:0008:30Same day
- 18:0009:30Same day
- 19:0010:30Same day
- 20:0011:30Same day
- 21:0012:30Same day
- 22:0013:30Same day
- 23:0014:30Same day
Uses your browser's IANA zone data — choose another date in the converter for historical or future days.
Preset shortcuts
Common deadlines
Five typical office times (morning through early evening) as a quick sanity check. Dial exact dates and share links in the deadline workspace above.
IRSTCST
Shortcut rows for typical meeting hours — see the full 24-hour grid above.
IRST with part-of-day icon
CST arrow and converted time
Day
- 09:0000:30Same day
- 12:0003:30Same day
- 15:0006:30Same day
- 17:0008:30Same day
- 18:0009:30Same day
Uses your browser's IANA zone data — choose another date in the converter for historical or future days.
FAQ
12PM IRST to CST
DST behaviour, sharing preset deadlines, and how to read business-hours badges in the target city.
See the live converter above — it calculates the exact CST time corresponding to 12pm IRST, including any day shift and DST effects.
Keep exploring
Related hubs & shortcuts
Other preset times for this pair, nearby deadline routes, city clocks, meeting overlap, and index pages—picked for this route so you can move on without searching.