The best time for a meeting between Boston and Seattle is inside the overlap of their working days — the hours when both cities are between 09:00 and 17:00 local time. In January the overlap is 0 hours; in July it is 0 hours. This page shows the overlap hour by hour, the best windows, the daylight saving dates that move the overlap, and the scheduling etiquette for this pair of cities.
Try the tool: Meeting Planner — see what time a proposed meeting is in Boston and Seattle, side by side.
Try the tool: Meeting Time Finder — enter the working hours for Boston and Seattle and find the overlap automatically.
Overlap between Boston and Seattle — hour by hour
The table shows every hour from 08:00 to 20:00 in Boston, what time it is in Seattle, and whether both cities are in their working day (09:00–17:00).
January
| Boston time | Seattle time | Boston working? | Seattle working? | Overlap? |
|---|---|---|---|---|
| 08:00 | 05:00 | No | No | No |
| 09:00 | 06:00 | Yes | No | No |
| 10:00 | 07:00 | Yes | No | No |
| 11:00 | 08:00 | Yes | No | No |
| 12:00 | 09:00 | Yes | No | No |
| 13:00 | 10:00 | Yes | No | No |
| 14:00 | 11:00 | Yes | No | No |
| 15:00 | 12:00 | Yes | No | No |
| 16:00 | 13:00 | Yes | No | No |
| 17:00 | 14:00 | No | No | No |
| 18:00 | 15:00 | No | No | No |
| 19:00 | 16:00 | No | No | No |
The best meeting windows
There is no window inside both working days, in January or in July — the difference is too large. The least-bad options are the edges of the day: 08:00 in Boston is 05:00 in Seattle in January, and 17:00 in Boston is 14:00 in Seattle. Rotate the early start between the two sides week by week, keep the meeting short, and record it so the side that cannot attend live can catch up. The meeting time finder will confirm that there is no overlap for these two cities, so you can stop looking for one and plan around the edges instead.
Daylight saving and the overlap
Boston observes daylight saving: in 2026 the clocks go forward on 8 March 2026 and back on 1 November 2026, moving the offset from UTC−05:00 to UTC−04:00.
Seattle observes daylight saving: in 2026 the clocks go forward on 8 March 2026 and back on 1 November 2026, moving the offset from UTC−08:00 to UTC−07:00.
The overlap never shifts: the difference between Boston and Seattle is 3 hours behind all year, so a recurring meeting stays in the same place in both cities' days. The DST pages — Boston DST 2026 and Seattle DST 2026 — confirm the dates for each city.
Scheduling etiquette for Boston and Seattle
Scheduling inside the Americas is usually straightforward: the difference between Boston and Seattle is small, and the working days overlap for most of the day. The main thing to check is daylight saving — not every place in the Americas observes it, and the ones that do change on different dates (the United States and Canada in March and November, Chile in September and April, Mexico not at all since 2022).
A few rules apply to every pair. Avoid Monday mornings and Friday afternoons — they are the edges of the week in every zone, and a meeting there is the first to be skipped. Avoid the weeks when the clocks change — the overlap moves, and a standing meeting lands at the wrong time. Always send the time in UTC as well as in each participant's local time, so nobody has to do the conversion in their head. And if the meeting has to happen outside someone's working hours, rotate it: a team that always meets at 09:00 in Boston is always meeting at 06:00 in Seattle, and the Seattle side will quietly disengage if that hour is always theirs to give up.
Worked examples
Three proposed times, worked out for January:
| Proposed time | In Boston | In Seattle | Verdict |
|---|---|---|---|
| 09:00 Boston time | 09:00 | 06:00 | Outside at least one working day |
| 12:00 Boston time | 12:00 | 09:00 | Inside both working days |
| 16:00 Boston time | 16:00 | 13:00 | Inside both working days |
In July, the verdicts are the same. The individual city pages — time in Boston and time in Seattle — have the working-hours tables for each city.
Boston and Seattle at a glance
| Fact | Boston | Seattle |
|---|---|---|
| Country | United States | United States |
| IANA time zone | America/New_York |
America/Los_Angeles |
| Standard offset | UTC−05:00 | UTC−08:00 |
| Daylight saving offset | UTC−04:00 | UTC−07:00 |
| Offset in January 2026 | UTC−05:00 | UTC−08:00 |
| Offset in July 2026 | UTC−04:00 | UTC−07:00 |
| Difference in January | 3 hours behind | |
| Difference in July | 3 hours behind |
Making it work week to week
There is no overlap between Boston and Seattle, so a recurring meeting will always cost someone their evening or their early morning. The sustainable answer is to rotate the awkward hour week by week, to keep the meeting short and infrequent — fortnightly rather than weekly where the work allows — and to do as much as possible asynchronously. A decision made in writing can be read by the person who was asleep; a decision made in a meeting has to be re-explained to them. The best global teams meet live only for the things that need live conversation, and write down everything else.
Whatever the overlap, the calendar mechanics are the same: set the event in UTC, not in local time, so it moves correctly when the clocks change; include the local time for each city in the invitation body; and re-check the overlap in March and October, when the difference moves. The meeting time finder finds the overlap for a whole team, and the time difference calculator works out the difference for any date.
Frequently asked questions
What is the best time for a meeting between Boston and Seattle?
There is no hour inside both working days. Meet at the edge of the day and rotate the awkward hour.
How many hours overlap between Boston and Seattle?
In January the working days overlap for 0 hours; in July for 0 hours.
What time is it in Seattle when it is 09:00 in Boston?
It is 06:00 in January and 06:00 in July.
Does the overlap between Boston and Seattle change during the year?
No. The difference is 3 hours behind all year, so the overlap never moves.
What is the time difference between Boston and Seattle?
Seattle is 3 hours behind Boston in January and 3 hours behind Boston in July. Use the time zone converter for the full comparison.
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 meeting planner and meeting time finder — 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.