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The sun is directly overhead in Barbados twice a year, my guess is approx 5-6th May and 5-6th August. What are the exact dates?

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    $\begingroup$ Find the latitude of the Barbados (or where-ever) and see when the sun's declination is equal to that latitude using something like HORIZONS: ssd.jpl.nasa.gov/horizons/app.html or WebGeoCalc wgc.jpl.nasa.gov:8443/webgeocalc/#NewCalculation or any astronomy software $\endgroup$ Aug 15 at 12:11
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    $\begingroup$ A more general question (which might already have an answer) is "how do I compute on which days, if any, the Sun is overhead at a given location?" $\endgroup$ Aug 15 at 12:14
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    $\begingroup$ please take a look here timeanddate.com they have the answer to your question and a lot more. $\endgroup$ Aug 15 at 14:18

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