Dhaka is 3 hours ahead of Istanbul for most of the year: when it is 10:00 am in Istanbul it is 1:00 pm in Dhaka. In offset terms Istanbul is on UTC+03:00 and Dhaka is on UTC+06:00 in January, and UTC+03:00 and UTC+06:00 in July. The converter above works from your browser’s own time zone data, so the figure it shows is the one in force today rather than the one that was in force when this page was written.
Neither city changes its clocks. Istanbul stays on UTC+03:00 and Dhaka stays on UTC+06:00 all year. The difference is therefore fixed for all of 2026, which makes this one of the few city pairs where a single number is the whole answer: Dhaka is always 3 hours ahead of Istanbul. Recurring meetings between the two never drift, and the table below confirms it period by period.
For arranging anything, the number that matters is the overlap. Istanbul works 09:00 to 18:00 and Dhaka works 09:00 to 17:00, which leaves 09:00 to 14:00 in Istanbul — 12:00 to 17:00 in Dhaka — as the window when both are open. That is 5 hours of shared working time. The working weeks differ: Dhaka works Sunday to Thursday, so Friday is a weekend there while Istanbul is still open, and Sunday is a working day there while Istanbul is closed.
Two local details worth knowing. Turkey moved to permanent UTC+03:00 in 2016 and no longer changes clocks, putting it an hour ahead of central Europe in winter and level in summer. The working week is Sunday to Thursday and the clock is UTC+06:00 all year, half an hour ahead of India.
Write the invitation in both clocks. "10:00 Istanbul / 13:00 Dhaka" removes the ambiguity that abbreviations introduce — Istanbul alone is read as +03 in winter and +03 in summer, and calendar software will happily convert one into the other without telling you.
The formula
local Istanbul- The time you enter, on the Istanbul clock
offset- Each city’s UTC offset at that moment, read live from the IANA time zone database in your browser
+3- The difference in hours that holds for most of 2026: Dhaka is 3 hours ahead of Istanbul
day shift- Whether the converted time falls on the previous, same or next calendar day in Dhaka
How it works, step by step
- Enter a time in Istanbul using the 24-hour hour box and the minute box — 15:30 is hour 15, minute 30.
- Your browser reports the UTC offset in force in Istanbul and in Dhaka for that moment, so a date near a daylight saving transition is handled correctly rather than with a fixed 3 hour rule.
- The second offset minus the first gives the difference, which is added to the time you entered. A result past midnight is marked as the next or previous day, because that is where most conversion mistakes live.
- The panel also shows the current time in both cities, the date in Dhaka, and whether the two offices are open at the same moment.
Worked examples
09:00 in Istanbul
09:00 in Istanbul is 12:00 in Dhaka — inside Dhaka office hours. In 12-hour terms, 9:00 am against 12:00 pm. Both offices are open at that moment, so it is a slot either side can accept.
12:00 in Istanbul
12:00 in Istanbul is 15:00 in Dhaka — inside Dhaka office hours. In 12-hour terms, 12:00 pm against 3:00 pm. Both offices are open at that moment, so it is a slot either side can accept.
17:00 in Istanbul
17:00 in Istanbul is 20:00 in Dhaka — after the Dhaka working day has finished. In 12-hour terms, 5:00 pm against 8:00 pm. Only one of the two offices is open at that moment, so it is worth offering rather than assuming.
23:00 in Istanbul, and the date problem
23:00 in Istanbul is 02:00 in Dhaka (next day). This is where conversions go wrong in writing: the time is right, the day is not, and a meeting invitation sent for "Tuesday" arrives for the wrong Tuesday. Give the date in both cities whenever the converted time is near midnight.
How to read your score
Frequently asked questions
How many hours ahead of Istanbul is Dhaka?
Dhaka is 3 hours ahead of Istanbul for most of 2026, so 09:00 in Istanbul is 12:00 in Dhaka. That difference holds for the whole year, because the two clocks either never change or change on the same dates — the table on this page confirms it period by period.
What is 2 pm Istanbul time in Dhaka?
5:00 pm, after the Dhaka working day has finished. In 24-hour form 14:00 in Istanbul is 17:00 in Dhaka, and that is outside working hours in Dhaka.
What is the best time to call between Istanbul and Dhaka?
Anywhere between 09:00 and 14:00 Istanbul time, which is 12:00 to 17:00 in Dhaka. Both offices are open across that whole window — 5 hours of it. If you want one answer rather than a range, 11:30 in Istanbul is the middle of the overlap.
Is Dhaka ahead of or behind Istanbul?
Dhaka is ahead. Istanbul is at UTC+03:00 and Dhaka is at UTC+06:00 in mid-January, and UTC+03:00 and UTC+06:00 in mid-July. The clock moves forward going from Istanbul to Dhaka, which is why Dhaka reaches the end of its working day first.
Do Istanbul and Dhaka change their clocks on the same date?
Neither city changes its clocks. In 2026, Istanbul does not change its clocks at all, and Dhaka does not change its clocks at all. The difference between the two cities therefore holds all year.
What do the abbreviations for Istanbul mean?
Istanbul is on +03 in winter and +03 in summer, while Dhaka uses +06 and +06. Abbreviations are the least reliable way to write a time: several are ambiguous between regions, and the summer and winter forms are an hour apart. A UTC offset, or the time given in both cities, cannot be misread.
Does this converter stay correct after the clocks change?
Yes. It does not use a stored number for the difference. Each time you change a value it asks your browser for the UTC offset that Europe/Istanbul and Asia/Dhaka are on at that moment, using the IANA time zone database that ships with your operating system, and takes the difference. The tables on this page are computed from the same database for 2026.
Are the working weeks the same in Istanbul and Dhaka?
No. Istanbul works Mon-Fri and Dhaka works Sun-Thu, so part of one city’s week falls on the other’s weekend. Check the day as well as the hour before proposing a slot.
Istanbul to Dhaka: every hour, every period of 2026, and meeting slots
| Istanbul (24h) | Istanbul (12h) | Dhaka (24h) | Dhaka (12h) | Status |
|---|---|---|---|---|
| 00:00 | 12:00 am | 03:00 | 3:00 am | outside office hours |
| 01:00 | 1:00 am | 04:00 | 4:00 am | outside office hours |
| 02:00 | 2:00 am | 05:00 | 5:00 am | outside office hours |
| 03:00 | 3:00 am | 06:00 | 6:00 am | outside office hours |
| 04:00 | 4:00 am | 07:00 | 7:00 am | outside office hours |
| 05:00 | 5:00 am | 08:00 | 8:00 am | outside office hours |
| 06:00 | 6:00 am | 09:00 | 9:00 am | office hours in Dhaka |
| 07:00 | 7:00 am | 10:00 | 10:00 am | office hours in Dhaka |
| 08:00 | 8:00 am | 11:00 | 11:00 am | office hours in Dhaka |
| 09:00 | 9:00 am | 12:00 | 12:00 pm | office hours in both |
| 10:00 | 10:00 am | 13:00 | 1:00 pm | office hours in both |
| 11:00 | 11:00 am | 14:00 | 2:00 pm | office hours in both |
| 12:00 | 12:00 pm | 15:00 | 3:00 pm | office hours in both |
| 13:00 | 1:00 pm | 16:00 | 4:00 pm | office hours in both |
| 14:00 | 2:00 pm | 17:00 | 5:00 pm | office hours in Istanbul |
| 15:00 | 3:00 pm | 18:00 | 6:00 pm | office hours in Istanbul |
| 16:00 | 4:00 pm | 19:00 | 7:00 pm | office hours in Istanbul |
| 17:00 | 5:00 pm | 20:00 | 8:00 pm | office hours in Istanbul |
| 18:00 | 6:00 pm | 21:00 | 9:00 pm | outside office hours |
| 19:00 | 7:00 pm | 22:00 | 10:00 pm | outside office hours |
| 20:00 | 8:00 pm | 23:00 | 11:00 pm | outside office hours |
| 21:00 | 9:00 pm | 00:00 (next day) | 12:00 am (next day) | outside office hours |
| 22:00 | 10:00 pm | 01:00 (next day) | 1:00 am (next day) | outside office hours |
| 23:00 | 11:00 pm | 02:00 (next day) | 2:00 am (next day) | outside office hours |
Computed at a difference of 3 hours, which is the one that holds for most of 2026. During the transition windows in the table below, shift the right-hand columns by an hour.
| Period | Length | Istanbul offset | Dhaka offset | Difference | Abbreviations |
|---|---|---|---|---|---|
| 01 Jan to 31 Dec | 365 days | UTC+03:00 | UTC+06:00 | +3:00 | +03 / +06 |
Every row is read from the IANA time zone database. Short periods appear where one city has changed its clocks and the other has not yet done so.
| Istanbul | 12-hour | Dhaka | Verdict |
|---|---|---|---|
| 06:00 | 6:00 am | 09:00 | Too early in Istanbul |
| 06:30 | 6:30 am | 09:30 | Too early in Istanbul |
| 07:00 | 7:00 am | 10:00 | Too early in Istanbul |
| 07:30 | 7:30 am | 10:30 | Too early in Istanbul |
| 08:00 | 8:00 am | 11:00 | Too early in Istanbul |
| 08:30 | 8:30 am | 11:30 | Too early in Istanbul |
| 09:00 | 9:00 am | 12:00 | Good — both offices open |
| 09:30 | 9:30 am | 12:30 | Good — both offices open |
| 10:00 | 10:00 am | 13:00 | Good — both offices open |
| 10:30 | 10:30 am | 13:30 | Good — both offices open |
| 11:00 | 11:00 am | 14:00 | Good — both offices open |
| 11:30 | 11:30 am | 14:30 | Good — both offices open |
| 12:00 | 12:00 pm | 15:00 | Good — both offices open |
| 12:30 | 12:30 pm | 15:30 | Good — both offices open |
| 13:00 | 1:00 pm | 16:00 | Good — both offices open |
| 13:30 | 1:30 pm | 16:30 | Good — both offices open |
| 14:00 | 2:00 pm | 17:00 | After hours in Dhaka |
| 14:30 | 2:30 pm | 17:30 | After hours in Dhaka |
| 15:00 | 3:00 pm | 18:00 | After hours in Dhaka |
| 15:30 | 3:30 pm | 18:30 | After hours in Dhaka |
| 16:00 | 4:00 pm | 19:00 | After hours in Dhaka |
| 16:30 | 4:30 pm | 19:30 | After hours in Dhaka |
| 17:00 | 5:00 pm | 20:00 | After hours in Dhaka |
| 17:30 | 5:30 pm | 20:30 | After hours in Dhaka |
| 18:00 | 6:00 pm | 21:00 | Outside both |
| 18:30 | 6:30 pm | 21:30 | Outside both |
| 19:00 | 7:00 pm | 22:00 | Outside both |
| 19:30 | 7:30 pm | 22:30 | Outside both |
| 20:00 | 8:00 pm | 23:00 | Outside both |
| 20:30 | 8:30 pm | 23:30 | Outside both |
| 21:00 | 9:00 pm | 00:00 (next day) | Outside both |
| 21:30 | 9:30 pm | 00:30 (next day) | Outside both |
Office hours taken as 09:00–18:00 in Istanbul and 09:00–17:00 in Dhaka, which are the customary hours in each city rather than a generic nine to five.