The posting says 11:59pm on 3 December and the university is in London, and you are somewhere else entirely. That sentence is unambiguous to the person who wrote it and completely useless to you until somebody converts it, which is how people end up submitting eleven hours late without ever having done anything wrong.
This does that conversion. You give it the deadline date and time, the time zone the institution is publishing in, and your own time zone, and it shows you the same moment rendered both ways so there is no guessing left in it.
It is built for international students, exchange students, and anyone doing a distance programme from a different continent. Everything runs in your browser and nothing is stored or sent anywhere.
Convert your deadline from one time zone to another. Essential for international students submitting to institutions abroad.
How it works
Fill in the deadline date, the time as it was published, then choose the institution’s time zone and yours from the dropdowns. The list carries 23 zones, running from Pacific/Midway through Honolulu, Los Angeles, New York, London, Paris, Berlin, Cairo, Dubai, Karachi, Kolkata, Shanghai, Tokyo and on to Sydney and Auckland, so the major offsets are all covered.
If you leave the time blank it assumes 11:59pm, which is the cutoff almost every submission portal uses anyway. Then press Calculate.
You get three things back: the original as it reads in the institution’s zone, the converted version in your zone, and a line stating the time the deadline lands at where you are. The conversion runs through your browser’s built-in time zone database, which means daylight saving is handled for the date you actually entered rather than by a fixed offset you looked up somewhere.
Worked example
A professor in London posts an assignment due 11:59pm on 3 December 2026, Europe/London, and you are in Asia/Kolkata. London is on GMT in December at UTC+0 and India sits at UTC+5:30 with no daylight saving of its own, so the deadline reads 5:29am on 4 December 2026 your time. Not late at night. Before breakfast, the next morning.
Second one, with daylight saving in play. A deadline of 11:59pm on 20 April 2026 published in America/Los_Angeles for someone in Europe/Paris. Los Angeles is on PDT at UTC-7 in April and Paris is on CEST at UTC+2, a nine hour gap, so the deadline falls at 8:59am on 21 April 2026 in Paris. Move that same deadline into the last week of October and the gap is only eight hours, because Europe has gone back to standard time while California is still on daylight saving. The two continents change their clocks on different weekends, and that fortnight of mismatch is where hand-done conversions break.
That nine versus eight is exactly the kind of thing people get wrong when they do the maths by hand once in October and reuse it all year.
Common mistakes
The first is assuming a fixed offset. Any deadline that sits on the wrong side of a daylight saving change shifts by an hour depending on which side of the change the date falls, and the two zones involved may change on completely different weekends. Let the date you enter decide it, which is what this does.
The second is picking the wrong zone from the list. There is no city search, so if your institution is in a place that is not on the list, choose a major city on the same offset. Check which one against a standard time zone map, because being an hour out on an offset is the whole problem you were trying to solve.
The third, and the one worth stating plainly: this is a check, not a contract. The posting on the university’s own submission portal is the version that counts, so use this to catch yourself and then confirm against the official page before you rely on it. If the tool and the portal disagree, the portal wins.
Other tools
- Group Meeting Finder — find an hour that works across a team
- International Timezone Converter — any time, any two zones
- Multi Zone Meeting — plan across four or five zones at once
Frequently asked questions
Does it handle daylight saving time?
Yes, for the date you enter. It uses your browser’s own time zone database, so a deadline in April and the same deadline in January can come back an hour apart, which is correct rather than inconsistent.
What if my time zone is not in the dropdown?
Pick a major city on the same offset as yours. The offsets are standard, so any city sharing your offset gives the same answer. Get the offset right and the result holds.
Do I have to type the time?
No. Leave it empty and the tool uses 11:59pm, since that is the cutoff almost every portal uses. Enter a time only when the posting gives you a specific one, such as a 9am exam start.
Is this the official deadline for my course?
It is a conversion of the deadline you entered, not a source of deadlines. Always read the official posting on your institution’s portal first, convert that, and treat the portal as the final word if the two disagree.
Does it keep my deadline or send it anywhere?
No. The calculation happens in your browser with no account and no server involved. Close the tab and nothing about the date remains, so copy the converted time into your own calendar.