Equation of time

Equation of time

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Audemars Piguet Jules Audemars Equation of Time

Equation of time is a horological complication.

The equation of time is the difference over the course of a year between time as read from a sundial and time as read from a clock, measured in an ideal situation (ie. in a location at the centre of a time zone, and which does not use daylight saving time).