Ethiopia cannot have its own calendar.

Ethiopia cannot have its own calendar.:

The tropics that cover about 26.11% of our planet earth remain undiscovered. The tropics is undiscovered, because both use of Ethiopian calendar months only in the current Ethiopia and Gregorian calendar months in the tropics are unrealistic. Use of Ethiopian calendar only in the current Ethiopia is unrealistic, because the circumference of current Ethiopia cannot cover 24 hours (half part of Ethiopia is day and other half part is night). Use of the Gregorian calendar months in the tropics is unrealistic, because longer variations of day and night and extreme seasons of the temperates which are revealed by the Gregorian calendar months were/are/will not recur in the tropics.