The Timepiece Journal » world time

Authoritative answers to the most common questions about GMT, the International Date Line, Beijing Time, leap seconds, and how world clocks work — and how it all connects to luxury watchmaking.

Clear answers to the most common questions about time zones — who invented them, how they work, what the International Date Line is, and how they connect to the watches we wear today.

Clear answers to the most common questions about world time, time zones, solar days, ephemeris seconds, and atomic clocks — and how it all connects to the watch on your wrist.