The Ethiopian Calendar
The Ethiopian Calendar is based on the ancient Coptic calendar and still in use today. It includes twelve 30-day months and a 13th month of five days (six days in leap years). For more information, please see Wikipedia. To convert from the Western calendar, please use the tool on the right.

The Ethiopian Clock
The Ethiopian clock has 24 hours in a day, similar to its western counterpart. However, Ethiopia has shifted their clock by six hours so that the clock rolls over at 6 am - the start of the day. This is an entirely sensible approach given Ethiopia is located near the equator and the sun comes up at the same time every day of the year. To convert between the Ethiopian and western clocks, simply substract six hours.