J. sends this from the information book in an Ethiopian hotel.
“Ethiopia uses the Ethiopian calendar. One Ethiopian year consists of 13 months; 12 months of 30 days and a thirteenth month of 5 days (6 in a leap year). The Ethiopian new year falls on the 10th or 11th September according to the Gregorian calendar, depending if the year is a leap year. The Ethiopian calendar is 7-8 years behind the Gregorian calendar. The 12-hour clock cycle in Ethiopia is offset by 6 hours. For example, Ethiopia refers to 6 a.m. as 12:00 hours and 12 noon as 6:00 hours. Please bear this in mind when making local appointments.”
So the calendar’s different (lots of that going around) and the names of the hours are different (lots of that going around too, apparently), but the minutes are still the same length.