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Street sundial near windmill De Valk in Leiden

The street sundial, near molen De Valk in Leiden, indicates the Leiden time. This time is based on the geographical location of Leiden and lags about 36 minutes behind Middle European Time.

The outer scale shows the Middle European Winter Time, 10 past 11 in the morning (the hour indicator is to the left of the number). On the street clock opposite the sundial, you can see that the actual time of taking the panorama was 10 minutes past midday, Middle European Summer Time.

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Copyright: Henk Keijzer
Type: Spherical
Resolution: 6000x3000
Taken: 20/06/2009
Uploaded: 12/09/2009
Updated: 02/03/2015


Tags: sundial; windmill; de valk; leiden
  • Donna about 1 month ago
    Wonderful photo Henk, but actually the sundial reads approx. 10.30am which is the local apparent (solar) time which on 20/6/2009 corresponded to approx. 10.28 local mean time, which when converted to standard time (equivalent of central european time which is 42min ahead of Leiden) gives 11.10am, and then allowing for the summer's daylight savings time gives exactly 12.10pm as recorded by the clock opposite. I'm giving a talk in Leiden on time measurement next week and this photo is a lovely example of how to convert from standard (watch) time to sundial (solar) time! I'm glad the sun was shining when you took this photo!
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