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How to calculate time in different places using latitudes and longitudes?
Take for example: 75°57′8″W, a line of longitude. We all know that lines of longitude measure the time zones. 

There are 360 degrees of longitude, and there are 24 hours in a day. Therefore, an hour would be 15 degrees longitude (360/24). 

75° would be the number of degrees of longitude. If we take 75 and divide it by 15, we get the number of hours that we want, in this case, 5 hours. 

57′ would be the number of minutes. 

8″ would be the number of seconds. 


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