When it is 09:00 in Seoul it is 18:00 in Mexico City in January and 18:00 in July. Mexico City is 15 hours behind Seoul right now — and the difference is the same all year. This page gives the live times in both cities, the overlap between their working days, the daylight saving dates that move the difference, and the best meeting windows.
Try the tool: Time Zone Converter — convert any time between Seoul and Mexico City, with the offset for the date you pick.
Live times in Seoul and Mexico City
The two cities side by side. The January column uses the winter offsets (Seoul UTC+09:00, Mexico City UTC−06:00); the July column uses the summer offsets (Seoul UTC+09:00, Mexico City UTC−06:00).
| Time in Seoul | Mexico City in January | Mexico City in July |
|---|---|---|
| 00:00 | 09:00 | 09:00 |
| 06:00 | 15:00 | 15:00 |
| 09:00 | 18:00 | 18:00 |
| 12:00 | 21:00 | 21:00 |
| 15:00 | 00:00 | 00:00 |
| 17:00 | 02:00 | 02:00 |
| 21:00 | 06:00 | 06:00 |
The world clock shows the current time in both cities live, and the individual city pages — time in Seoul and time in Mexico City — explain each city's time zone, offsets and daylight saving in full.
The time difference between Seoul and Mexico City
The difference is constant: Mexico City is 15 hours behind Seoul on every day of the year. That is the simplest case in time-zone work — the answer does not depend on the date, and a meeting set for 09:00 in Seoul is always 18:00 in Mexico City. The reason the difference never changes is that neither city observes daylight saving.
To convert a time, add the difference: 09:00 in Seoul is 18:00 in Mexico City in January and 18:00 in July; 17:00 in Seoul — the end of the working day — is 02:00 in Mexico City in January and 02:00 in July. To go the other way, subtract it: 09:00 in Mexico City is 00:00 in Seoul in January. The time difference calculator does the arithmetic for any date, and the UTC to Mexico City page gives the full conversion table for Mexico City.
Meeting overlap between Seoul and Mexico City
The overlap is the hours when both cities are in their working day (09:00–17:00 local time). The table marks the overlapping hours in Seoul's working day and shows what time they are in Mexico City.
January
| Seoul time | Mexico City time | Both working? |
|---|---|---|
| 09:00 | 18:00 | No |
| 10:00 | 19:00 | No |
| 11:00 | 20:00 | No |
| 12:00 | 21:00 | No |
| 13:00 | 22:00 | No |
| 14:00 | 23:00 | No |
| 15:00 | 00:00 | No |
| 16:00 | 01:00 | No |
In January the overlap is 0 hours: there is no hour when both cities are in their working day. In July it is 0 hours: there is no hour when both cities are in their working day. The two working days do not overlap at all — the difference is too large. The only options are to meet at the edge of the day, to rotate the awkward hour, or to record the meeting.
Daylight saving in Seoul and Mexico City
Seoul does not observe daylight saving, so its offset of UTC+09:00 never changes.
Mexico City does not observe daylight saving, so its offset of UTC−06:00 never changes.
The difference never changes, so there is no date on which a standing meeting moves. That does not mean the difference is the same as the difference with a third city — the difference between Seoul and London, for example, may still move when London changes its clocks. The individual DST pages — Seoul DST 2026 and Mexico City DST 2026 — give the exact dates for each city.
Best meeting windows
There is no window inside both working days, in January or in July. The least-bad options are the edges: 08:00 in Seoul is 17:00 in Mexico City in January — before the working day in Seoul but a reasonable evening in Mexico City — and 17:00 in Seoul is 02:00 in Mexico City, which is the morning in Mexico City the next day if the difference is large. Rotate the early start between the two sides, week by week, so the same people are not always the ones getting up early.
Calling and travel notes
When it is 09:00 in Seoul it is 18:00 in Mexico City in January; when it is 12:00 in Seoul it is 21:00 in Mexico City; when it is 17:00 in Seoul it is 02:00 in Mexico City. The difference is 12 hours or more, so the two cities are on different dates for part of the day: when it is Monday morning in Seoul, it is still Sunday in Mexico City if Mexico City is behind, or already Monday evening if it is ahead. Always state the date as well as the time when you schedule across this pair. Scheduling between the Americas and Asia is the hardest case in time-zone work: the difference is 12 hours or more, so one side's working day is the other's night. The only workable approach is to meet at the edge of the day — early morning in Seoul and evening in Mexico City, or the reverse — and to keep the meeting short. Rotate the awkward hour week by week, or the same side will always be the one giving up its evening. Record the meeting and share notes, so the side that could not attend can still follow the decision.
Worked conversions
Six conversions, for January (offsets Seoul UTC+09:00, Mexico City UTC−06:00):
| Seoul | Mexico City |
|---|---|
| 08:00 | 17:00 |
| 09:00 | 18:00 |
| 12:00 | 21:00 |
| 14:00 | 23:00 |
| 17:00 | 02:00 |
| 20:00 | 05:00 |
In July, the answers are the same. For the reverse direction, see Mexico City to Seoul time.
Seoul and Mexico City at a glance
| Fact | Seoul | Mexico City |
|---|---|---|
| Country | South Korea | Mexico |
| Region | Asia | Americas |
| IANA time zone | Asia/Seoul |
America/Mexico_City |
| Standard offset | UTC+09:00 | UTC−06:00 |
| Daylight saving offset | — does not observe | — does not observe |
| Offset in January 2026 | UTC+09:00 | UTC−06:00 |
| Offset in July 2026 | UTC+09:00 | UTC−06:00 |
| Observes daylight saving | No | No |
The table is the whole pair in one place. The two numbers that matter most are the January and July offsets: if they are the same in both columns for a city, that city's offset never changes; if they differ, the city observes daylight saving and the difference between the cities moves with it. The individual city pages — time in Seoul and time in Mexico City — explain each city's time zone, and the DST pages — Seoul DST 2026 and Mexico City DST 2026 — give the exact change dates.
Frequently asked questions
What is the time difference between Seoul and Mexico City?
Mexico City is 15 hours behind Seoul right now. In January the difference is 15 hours behind and in July it is 15 hours behind — it is the same all year.
How do I schedule a recurring meeting between Seoul and Mexico City?
Pick a time inside the overlap — the edge of the day, since there is no overlap — and set the calendar event in UTC so it moves correctly when the clocks change. Re-check the overlap in March and October, when the difference moves, and rotate the time if the meeting falls outside someone's working day.
What time is it in Mexico City when it is 09:00 in Seoul?
It is 18:00 in January and 18:00 in July. The time zone converter gives the answer for any date.
What is the best time for a meeting between Seoul and Mexico City?
There is no hour inside both working days. Meet at the edge of the day — early morning in one city, evening in the other — and rotate the awkward hour.
Does the time difference between Seoul and Mexico City change during the year?
No. The difference is 15 hours behind all year, because neither city observes daylight saving.
What time is it in Seoul when it is 09:00 in Mexico City?
It is 00:00 in January and 00:00 in July. See Mexico City to Seoul time for the full comparison from Mexico City's side.
What are the time zones of Seoul and Mexico City?
Seoul is in Asia/Seoul (UTC+09:00 standard time) and Mexico City is in America/Mexico_City (UTC−06:00 standard time).
What time is it in Seoul when it is midnight in Mexico City?
It is 15:00 in Seoul in January and 15:00 in July — the previous day, because Mexico City is ahead of Seoul. Midnight conversions are the ones that most often land on the wrong date, so always check the date as well as the time.
Sources
- IANA Time Zone Database, via Node.js Intl (
Intl.DateTimeFormatwithtimeZone) — offsets, daylight saving dates and local times in this article were worked out from the IANA database, not typed from memory. - TimeFlow's own time-zone data (
data/cities.ts,data/dst.ts), computed from the IANA database. - TimeFlow's time zone converter and meeting planner — the live tools behind the numbers on this page.
- Time-zone and daylight saving rules are set by governments and can change. For flights, deadlines and meetings that cannot move, confirm the time with an official source.