How Daylight Saving Time Works
Why clocks change twice a year, which countries still do it, and how to handle the transitions without confusion.
7 min readPlain-English explanations of time zones, daylight saving time, UTC, and everything in between.
Why clocks change twice a year, which countries still do it, and how to handle the transitions without confusion.
7 min readThe difference between UTC and GMT, why it matters for software and travel, and how UTC offsets work.
6 min readA practical guide to finding overlap windows, avoiding DST traps, and communicating times unambiguously.
8 min readA complete explanation of how time zones are defined, why they follow political borders, and how the IANA database works.
7 min readThe history behind how the world carved itself into time zones — from railroads to the International Meridian Conference.
8 min readHow humanity went from local sun time to a globally agreed system, and the political battles fought along the way.
9 min readThe most common time zone mistakes in software — storing UTC, handling DST gaps, and displaying local time correctly.
10 min readWhich regions observe DST, which abolished it, and why the switch dates differ between countries.
6 min read