Ok, so if the chart says the sun set at 18:26 GMT, 28 March 1941, then, I should look at a map and figure that being off Trinidad, I am four timezones to the west, so I should expect the sun to set at 22:26 GMT.
EXCEPT I'm much closer to the equator, which should make the sun set even later. Is there any rule of thumb or simple equation to use to factor in the effect of lattitude?
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