Since the Earth rotates at a steady rate of 360 ° per day, or 15 ° per hour (in mean solar time), there is a direct relationship between time and longitude.
There is a direct relationship between time and longitude. The Earth rotates at a steady rate of 360 ° per day per hour (in mean solar time). The Earth rotates at a steady rate of 15 ° per hour (in mean solar time).