ጊዜ ፣ የኢትዮጵያውያን የዘመን አቆጣጠር ቀመር እና የዘመናዊ ሥነፈለክ መንደርደሪያዎች

Calendar is one the pillars of human civilization. In his pursuit of designing a system of measuring and keeping time man rose his head to the heavens. He observed the movement of the heavenly bodies and tried to decipher the laws that govern them. His continuous efforts and book keeping allowed him identify the cyclic nature of their movements. From those, he defined measurements of time that allows him keep the days, the months, the years and other periods of time. This made the making and fine tuning most calendars to be closely linked with astronomy and astrology. In this article, we will present and discuss the algorithms of the Ethiopian calendar. In the same thread, we will look into and discuss the two main references of the Ethiopian calendar, the book of Enoch and the book of Abushaker. We will then look into early precursors of modern astronomy for framing the subject matter from within the context of astronomy. Finally, some more clarifications, and Visual Basic programmes that contain algorithms for using the Ethiopian Calendar and the Geez numerals in the Microsoft Excel are appended.