Time zone guides
Every guide on Timemazone. Each one answers a single question and is checked against the IANA database rather than repeated from elsewhere.
10 guides.
- What Is UTC?UTC (Coordinated Universal Time) is the reference point every time zone is measured against. Here is what it actually is — and is not.
- GMT vs UTC: What’s the Difference?GMT and UTC are used almost interchangeably, but they are not defined the same way. Here is the practical difference.
- How Daylight Saving Time WorksDaylight saving time moves clocks forward in spring and back in autumn — but not everywhere. Here is who observes it and why it matters for scheduling.
- EST vs EDT: What’s the Difference?EST and EDT are not two different time zones — they’re the same zone at two different times of year. Here is exactly how it works.
- PST vs PDT: What’s the Difference?PST and PDT are the same US Pacific time zone at two different times of year. Here is what changes, and what doesn’t.
- Why Time Differences Between Cities Change During the YearThe time difference between two cities isn’t always fixed — it can shift by an hour depending on the season. Here’s why, with a real example.
- How to Schedule Meetings Across Time ZonesA practical process for finding a meeting time that works across time zones — without the back-and-forth.
- How to Avoid Daylight Saving Time Meeting MistakesRecurring meetings break when one participant’s country changes to or from daylight saving time and another doesn’t. Here is how to avoid it.
- Best Practices for Scheduling Distributed Team MeetingsA few habits that make recurring meetings less painful for distributed teams spread across many time zones.
- How Time Zones Work (and Why They’re Not Always a Whole Hour Apart)Time zones roughly follow 15° slices of longitude, but political borders bend that pattern — including a few zones offset by 30 or 45 minutes.