How to find the time difference between two places
A reliable method for comparing two places without confusing wall-clock readings, UTC offsets, dates, or seasonal changes.
Read articleTime-zone essentials
Understand the rules behind the clocks
Practical explanations of offsets, daylight-saving changes, and identifiers for planning across places.
Why the time difference changes during the year
Different daylight-saving schedules can change the gap between two places even when neither place changes its geographic location.
Read articleWhy IANA zone names are safer than abbreviations
Short labels such as CST can mean different regions, while IANA identifiers carry a rules history and a clear geographic reference.
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