Swatch Internet Time

Swatch Internet Time (or .beat time) is a decimal time system introduced in 1998 by the Swatch corporation as part of the marketing campaign for their line of ".beat" watches. Those without a watch could use the Internet to view the current time on the watchmaker's website, but now a dedicated wiki serves the purpose.^[1] The concept of .beat time is similar to decimal minutes in French Revolutionary decimal time.^[2]

Instead of hours and minutes, in Swatch Time the mean solar day is divided into 1,000 equal parts called .beats, meaning each .beat lasts 86.4 seconds (1.440 minutes) in standard time, and an hour lasts for approximately 42 .beats. The time of day always references the amount of time that has passed since midnight (standard time) in Biel, Switzerland, where Swatch's headquarters is located. For example, @248 BEATS indicates a time 248 .beats after midnight, or 248⁄1000 of a day (just over 5 hours and 57 minutes; or 5:57 AM UTC+1).

There are no time zones in Swatch Internet Time; it is a globally unified timekeeping system based on what Swatch calls "Biel Mean Time" (BMT), the time zone conventionally known as Central European Time or West Africa Time. Note that it is based on the time zone and not the actual mean solar time measured in Biel. Also, unlike civil time in Switzerland and many other countries, Swatch Internet Time has never observed daylight saving time (DST), even prior to more recent decisions to abandon DST in certain locales.^[3]

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