src/ethiopic/lib/startOfMonth.ts

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

/**
 * Start of month
 *
 * @param {Date} date - The original date
 * @returns {Date} The start of the month
 */
export function startOfMonth(date: Date): Date {
  const { year, month } = toEthiopicDate(date);
  return toGregorianDate({ year, month, day: 1 });
}