haile-mena/ethiopian-conversion

Gregorian to Ethiopian calendar conversion # Ethiopian Birthday Converter A simple web app that converts a Gregorian (Western) date to its Ethiopian calendar equivalent. ## Live Site haile-mena.github.io ## How It Works Enter any Gregorian birth date and the app will instantly convert it to the corresponding Ethiopian calendar date. The Ethiopian calendar (also known as the Ge'ez calendar) is the principal calendar used in Ethiopia. It has 13 months — 12 months of 30 days and a 13th month of 5 or 6 days — and runs roughly 7–8 years behind the Gregorian calendar. ## Conversion Logic The conversion uses the Julian Day Number (JDN) as an intermediate step: 1. The Gregorian date is converted to a JDN using a standard astronomical formula 2. The JDN is then mapped to an Ethiopian date using the Ethiopian epoch offset (`1 Mäskäräm, Year 1 = JDN 1723856`) ## Tech Built with plain HTML, CSS, and JavaScript — no frameworks or dependencies.