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Are sundials one hour slower in summer due to gmt?

Updated: 4/28/2022
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210194sean

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15y ago

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Sundials are one hour slower in the summer in places that use Daylight Saving Time. They aren't slower 'due to GMT'. GMT, or standard Universal Time, (UCT, I believe) remains the same all year regardless of where you are; GMT is not adjusted for Daylight Saving Time. You could, of course, turn your sundial to adjust for Daylight Saving Time, but if you are that interested in accurate time, you probably would not rely on a sundial.

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Q: Are sundials one hour slower in summer due to gmt?
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