====== Equation of time ======
{{wst>image_cl|Martin Braun|Notos W RGC RG|[[Martin Braun Notos]]\\ with indication of the\\ [[equation of time]]|210px}}

The **equation** of time is the difference between time as read from a sundial and time as read from a clock or watch (also called **solar time**).

Due to the elliptical orbit of the earth the two times only match on April 15, June 14, September 1 and Dec 24th. On all other days, the deviation reaches from minus 16 minutes 23 seconds (4 November) to plus 14 minutes 22 seconds (on February 11).

A manufacturer who specializes particularly in [[wristwatch]]es with [[equation of time]] display is [[Martin Braun]]. His model [[Martin Braun Notos|Notos]] also offers the additional [[complication]] of the display of the [[http://en.wikipedia.org/wiki/Declination|declination]].

===== See Also =====
  * [[Sunrise and sunset]]
  * [[Sidereal time]]


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