Zemen - የ ኢትዮጵያ ቀን መቁጠሪያ

Introduction

A date conversion crate to convert between ethiopian and gregorian dates. We have a custom struct to represent ethiopian date, i.e. Zemen, and we are using an external crate time, and specifically time::Date, to represent gregorian dates.

The crate uses the Beyene-Kudlek algorithm to convert between jdn (Julian Day number) and ethiopic calender. And the time crate to convert between jdn (Julian Day number) and gregorian date.

Docs found here

Installation

cargo add zemen

Usage

use time::{Date, Month};
use zemen::{Zemen, Werh};
use zemen::error;

fn main() -> Result<(), error::Error> {
  // creating dates
  // Werh means month in Ge'ez
  let qen = Zemen::from_eth_cal(1992, Werh::Tahasass, 22)?;
  let date = Date::from_calendar_date(2000, Month::January, 1)?;

  // conversion
  let converted_day = Date::from(&qen);
  let converted_qen = Zemen::from(&date);

  println!("date: {}", converted_day);
  println!("qen: {}", converted_qen);

  // accessing individual element
  println!("year: {}", qen.year());
  println!("month: {}", qen.month());
  println!("month(number): {}", qen.month() as u8);
  println!("day: {}", qen.day());

  // get the next, and previous date. `next` and `previous` consume `self`
  let nege = qen.next();
  println!("nege: {}", nege);
  let tilant = nege.previous().previous();
  println!("tilant: {}", tilant);

  // get the next month
  let qetay_wer = tilant.month().next();
  println!("wer: {}", qetay_wer);

  // get the previous month
  let yalef_wer = tilant.month().previous();
  println!("wer: {}", yalef_wer);
  Ok(())
}

Formatting

use zemen::*;
fn main() -> Result<(), error::Error> {
  let qen = Zemen::from_eth_cal(2015, Werh::Tir, 10)?;
  let formatted = qen.format("ዛሬ DD, MMM D-YYYY ነው");

  // prints: ዛሬ ረቡዕ, ጥር 10-2015 ነው
  println!("{}", formatted);
  Ok(())
}