Time Zones
Understand the mechanics of global timekeeping, from UTC offsets and the IANA database to daylight saving time and international coordination.
What Is UTC? Understanding Universal Time Coordinated
UTC is the atomic-clock-based time standard that anchors every clock on Earth. Here is how it works, why it is not quite the same as GMT, and what a UTC offset actually means.
UTC vs GMT: Understanding the Critical Differences
GMT comes from the stars; UTC comes from atoms. The difference is under a second, but it shapes how computers, scientists, and schedulers talk about time.
How Time Zones Work: A Complete Guide to Global Time
The world is divided into 38 time zones, not 24, and the rules that govern them live in a single database maintained by volunteers. Here is how the whole system fits together.
Daylight Saving Time Explained: History, Impact, and Future
Daylight saving time was an energy-saving idea from World War I. A century later, it disrupts sleep, complicates software, and may be on its way out.
Global Time Coordination: How the World Stays in Sync
A wristwatch and a data center on the other side of the planet agree to within milliseconds. Here is the chain of institutions, protocols, and clocks that makes that possible.
International Scheduling: A Practical Guide to Cross-Time-Zone Planning
Scheduling across time zones is less a math problem than a fairness problem. Here is how to find overlap, rotate the burden, and keep everyone sane.