src/ethiopic/lib/getMonth.ts

import { toEthiopicDate } from "../utils/index.js";

/**
 * Get month
 *
 * @param {Date} date - The original date
 * @returns {number} The zero-based month index
 */
export function getMonth(date: Date): number {
  const { month } = toEthiopicDate(date);
  return month - 1; // Return zero-based month index
}