Offset
The time difference between Istanbul and San Antonio is 8 hours.
Istanbul (TRT) is ahead of San Antonio (CDT).
TRT: UTC+3
CDT: UTC-5
San Antonio is currently observing daylight saving time; Istanbul is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Istanbul and San Antonio don't overlap on the same weekday. San Antonio is 8 hours behind Istanbul.
With some flexibility, there’s a workable window outside standard hours:
- 3 PM–8 PM in Istanbul (7 AM–12 PM in San Antonio) — suggest 5:00 PM Istanbul (9:00 AM San Antonio).
This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
Turkey
- New Year's DayThu, Jan 1
- National Independence & Children's DayThu, Apr 23
- Labour DayFri, May 1
- Atatürk Commemoration & Youth DayTue, May 19
- Democracy and National Unity DayWed, Jul 15
- Victory DaySun, Aug 30
- Republic DayThu, Oct 29
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
About these zones
Istanbul uses Turkey Time (TRT). To call Turkey, dial +90.
San Antonio uses Central Time (CST, or CDT). To call United States, dial +1.
San Antonio is approximately 6,500 miles northwest of Istanbul.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Istanbul | San Antonio | Day |
|---|---|---|
| 12:00 am | 4:00 pm | -1 day |
| 1:00 am | 5:00 pm | -1 day |
| 2:00 am | 6:00 pm | -1 day |
| 3:00 am | 7:00 pm | -1 day |
| 4:00 am | 8:00 pm | -1 day |
| 5:00 am | 9:00 pm | -1 day |
| 6:00 am | 10:00 pm | -1 day |
| 7:00 am | 11:00 pm | -1 day |
| 8:00 am | 12:00 am | Same day |
| 9:00 am | 1:00 am | Same day |
| 10:00 am | 2:00 am | Same day |
| 11:00 am | 3:00 am | Same day |
| 12:00 pm | 4:00 am | Same day |
| 1:00 pm | 5:00 am | Same day |
| 2:00 pm | 6:00 am | Same day |
| 3:00 pm | 7:00 am | Same day |
| 4:00 pm | 8:00 am | Same day |
| 5:00 pm | 9:00 am | Same day |
| 6:00 pm | 10:00 am | Same day |
| 7:00 pm | 11:00 am | Same day |
| 8:00 pm | 12:00 pm | Same day |
| 9:00 pm | 1:00 pm | Same day |
| 10:00 pm | 2:00 pm | Same day |
| 11:00 pm | 3:00 pm | Same day |
Daylight saving time
San Antonio observes daylight saving time; Istanbul does not. The offset between the two zones changes when San Antonio transitions: on Sunday, November 1, 2026, clocks fall back from CDT to CST.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:49 AM
- Sunset
- 8:33 PM
- Day length
- 14h 44m
- Sunrise
- 6:48 AM
- Sunset
- 8:34 PM
- Day length
- 13h 47m
Daylight overlap: 5h 45m — 2:48 PM–8:33 PM in Istanbul (6:48 AM–12:33 PM in San Antonio). Both locations are in daylight during this window.
Cities in these zones
Other cities in Turkey Time
Other cities in Central Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Turkey Time
- IST
- SAW
- ESB
- YEI
- ADB
- GZT
- DIY
- ADA
- COV
- ASR
Airports in Central Time
- GYY
- MDW
- ORD
- HOU
- IAH
- SAT
- DAL
- DFW
- AUS
- BNA
Related conversions
Common conversions
- What is 9:00 am Istanbul in San Antonio?
- 9:00 am Istanbul is 1:00 am San Antonio.
- What is 12:00 pm Istanbul in San Antonio?
- 12:00 pm Istanbul is 4:00 am San Antonio.
- What is 12:30 pm Istanbul in San Antonio?
- 12:30 pm Istanbul is 4:30 am San Antonio.
- What is 2:00 pm Istanbul in San Antonio?
- 2:00 pm Istanbul is 6:00 am San Antonio.
- What is 5:00 pm Istanbul in San Antonio?
- 5:00 pm Istanbul is 9:00 am San Antonio.
- What is 11:30 pm Istanbul in San Antonio?
- 11:30 pm Istanbul is 3:30 pm San Antonio.