Time zone guides
Practical, plain-language guides on living and working across time zones — the thinking behind Timezone Matcher, written so you can apply it with any tool.
Guide
How to schedule meetings across time zones
Anchor to UTC, find the real working-hours overlap, dodge daylight-saving bugs, and write invites nobody misreads.
Guide
Best times to work with remote teams
Overlap windows for US–Europe–Asia, when to go async, and how to set core hours that don't burn anyone out.
Guide
UTC, GMT and offsets explained
What UTC and GMT really mean, how UTC+1 works, and why a fixed offset isn't a time zone.
Guide
How time zones work
The fundamentals: why zones exist, the role of UTC, and how daylight saving shifts the clock.
Where to start
Your meeting keeps landing at 7 a.m. for someone.
Read how to schedule meetings across time zones. The method is to anchor the meeting to UTC, list each person's working hours in that same reference, and only then look for the overlap. If there is no overlap at all, the guide on remote teams explains when to rotate the inconvenient slot and when to stop meeting and go asynchronous. →
Two offices, and you're never sure who is ahead.
The time difference pages give the answer for 174 pairs of cities, computed from the official time-zone database, including the days of the year when the gap changes because one city moves its clocks and the other doesn't. That window is when most calendar mix-ups happen. →
An invite says 'UTC+1' and it was wrong by an hour.
UTC, GMT and offsets explained covers why a fixed offset is not a time zone: Madrid is UTC+1 in winter and UTC+2 in summer, so an invite that hard-codes the offset breaks twice a year. Use a city (Europe/Madrid) instead and the calendar does the rest. →
You plan months ahead.
The daylight saving calendar for 2027 lists the clock changes of each region with exact dates, so you can see in advance which weeks your usual overlap with another region shrinks or grows. →
Every figure on these pages is calculated from the IANA time-zone database, the same source your phone and your calendar use, and not typed by hand.
The tools
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